12th Standard Biology Study material & Free Online Practice Tests - View Model Question Papers with Solutions for Class 12 Session 2019 - 2020
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Biology Question Papers

12th Standard Biology English Medium Free Online Test 1 Mark Questions 2020 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    In which type of parthenogenesis are only males produced?

  • 2)

    Transverse Binary fission is seen is ______

  • 3)

    Paedogamy is the sexual union of _____

  • 4)

    A few statements describing certain features of reproduction are given below. Select the options that are true for both sexual and asexual reproduction from the options given:
    (i) Gametic fusion takes place
    (ii) Transfer of genetic material takes place
    (iii) Reduction division takes place
    (iv) Progeny have some resemblance, with parents

  • 5)

    The ______ is the smallest human cell.

12th Standard Biology English Medium Free Online Test One Mark Questions with Answer Key 2020 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Animals giving birth to young ones:

  • 2)

    In, dinoflagellates the types of asexual reproduction seen is _____

  • 3)

    Regeneration is not seen in ______

  • 4)

    The male sex hormone testosterone is secreted from

  • 5)

    Testosterone is secreted by ____

12th Standard Biology English Medium Free Online Test 1 Mark Questions 2020 - Part Two - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    The mode of reproduction in bacteria is by

  • 2)

    All the following animals are continuous breeders, except.

  • 3)

    The glandular accessory organ which produces the largest proportion of semen is

  • 4)

    Identify the correct statements from the following

  • 5)

    Which of the following phenotypes in the progeny are possible from the parental combination AxB?

12th Standard Biology English Medium Free Online Test One Mark Questions with Answer Key 2020 - Part Two - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Assertion and reasoning questions:
    In each of the following questions there are two statements. One is assertion (A) and other is reasoning (R). Mark the correct answer as
    Assertion: In bee society, all the members are diploid except drones.
    Reason: Drones are produced by parthenogenesis

  • 2)

    Ovovivipary is seen in ______

  • 3)

    In _____ types of parthenogenesis egg can develop into individuals of any sex.

  • 4)

    Given below, are a few statements related to external fertilization. Choose the correct statements:
    i. The male and female gametes are formed and released simultaneously
    ii. Only a few gametes are released into the medium
    iii. Water is the medium in a majority of organism exhibiting external fertilization
    iv. Offspring formed as a result of external fertilization have better chance of survival than those formed inside the organism

  • 5)

    The male homologue of the female clitoris is

12th Standard Biology English Medium Free Online Test 1 Mark Questions 2020 - Part Three - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Evolutionary history of an organism is called

  • 2)

    Allergy involves

  • 3)

    Recombinant Factor VIII is produced in the ______ cells of the Chinese Hamster

  • 4)

    Which of the following is correct for r-selected species

  • 5)

    The Ozone Day is observed every year on September 16 as on this day in 1987 the ___________was signed for launching efforts to arrest the depletion of the fragile ozone layer in the stratosphere that prevents the harmful ultra-violet rays of the sun from reaching the earth. Fill the correct word in blank.

12th Standard Biology English Medium Free Online Test One Mark Questions with Answer Key 2020 - Part Three - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Assertion and reasoning questions:
    In each of the following questions there are two statements. One is assertion (A) and other is reasoning (R). Mark the correct answer as
    Assertion: Offsprings produced by asexual reproduction are genetically identical to the parent.
    Reason: Asexual reproduction involves only mitosis and no meiosis

  • 2)

    Assertion (A): Asexual reproduction is called blastogenic reproduction.
    Reason (R): It is accomplished by mitotic and meiotic divisions.

  • 3)

    The most important hormone in intiating and maintaining lactation after birth is

  • 4)

    Select the incorrect action of hormonal contraceptive pills from the following

  • 5)

    Which of the following approach does not give the defined action of contraceptive?

12th Standard Biology English Medium Free Online Test 1 Mark Questions 2020 - Part Four - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Assertion and reasoning questions:
    In each of the following questions there are two statements. One is assertion (A) and other is reasoning (R). Mark the correct answer as
    Assertion: Offsprings produced by asexual reproduction are genetically identical to the parent.
    Reason: Asexual reproduction involves only mitosis and no meiosis

  • 2)


    Identify the correct option to label the diagram Identify the structure
    1- Immature proglottids
    2 - Gravid proglottids
    3 - Scolex
    4 - Mature proglottids
    5 - Neck

  • 3)

    ______ is not linked to polymenorrhoea

  • 4)

    Klinefelters’ syndrome is characterized by a karyotype of

  • 5)

    A mRNA molecule is produced by

12th Standard Biology English Medium Free Online Test One Mark Questions with Answer Key 2020 - Part Four - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    In which mode of reproduction variations are seen

  • 2)

    External fertilization is seen is ______

  • 3)

    Paedogenetic parthenogenesis is seen in ______

  • 4)

    Colostrum is rich in

  • 5)

    This technique is used to diagnose the chromosomal abnormities.

12th Standard Biology English Medium Free Online Test Book Back One Mark Questions - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Transgenic animals are those which have

  • 2)

    The point mutation sequence for transition, transition, transversion and transversion in DNA are

  • 3)

    Which of the following one is used as a Biosensors?

  • 4)

    Virus free plants are developed from

  • 5)

    A free living nitrogen fixing cyanobacterium which can also form symbiotic association with the water fern Azolla

12th Standard Biology English Medium Free Online Test Book Back 1 Mark Questions with Answer Key - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Darwin’s finches are an excellent example of

  • 2)

    Which among the following awards instituted by the Government of India for individuals or communities from rural areas that have shown extraordinary courage and dedication in protecting Wildlife?

  • 3)

    Identify the incorrect pair

  • 4)

    Pure tall plants are crossed with pure dwarf plants. In the F1 generation, all plants were tall. These tall plants of F1 generation were selfed and the ratio of tall to dwarf plants obtained was 3:1. This is called

  • 5)

    Which of the following one is used as a Biosensors?

12th Standard Biology English Medium Free Online Test Book Back One Mark Questions - Part Two - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Assertion and reasoning questions:
    In each of the following questions there are two statements. One is assertion (A) and other is reasoning (R). Mark the correct answer as
    Assertion: Offsprings produced by asexual reproduction are genetically identical to the parent.
    Reason: Asexual reproduction involves only mitosis and no meiosis

  • 2)

    Find the wrongly matched pair

  • 3)

    Match column I with column II and select the correct option from the codes given below.

    Column I Column II
    A. Copper releasing IUD (i) LNG-20
    B. Hormone releasing (ii) Lippes loop IUD
    C. Non medicated IUD (iii) Saheli
    D. Mini pills (iv) Multiload-375
  • 4)

    Pataus’ syndrome is also referred to as

  • 5)

    Meselson and Stahl’s experiment proved

12th Standard Biology English Medium Free Online Test Book Back 1 Mark Questions with Answer Key - Part Two - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Colostrum is rich in

  • 2)

    A contraceptive pill prevents ovulation by

  • 3)

    Which of the following phenotypes is not possible in the progeny of the parental genotypic combination IAIO X IAIB?

  • 4)

    ZW-ZZ system of sex determination occurs in

  • 5)

    Which of the following statements is not true about DNA replication in eukaryotes?

12th Standard Biology English Medium Free Online Test Book Back One Mark Questions - Part Three - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Assertion and reasoning questions:
    In each of the following questions there are two statements. One is assertion (A) and other is reasoning (R). Mark the correct answer as
    Assertion: In bee society, all the members are diploid except drones.
    Reason: Drones are produced by parthenogenesis

  • 2)

    The foetal membrane that forms the basis of the umbilical cord is

  • 3)

    Identify the correct statements from the following

  • 4)

    Which of the following is not correct?

  • 5)

    Pataus’ syndrome is also referred to as

12th Standard Biology English Medium Free Online Test Book Back 1 Mark Questions with Answer Key - Part Three - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Mammalian egg is

  • 2)

    A – Ovulation is the release of ovum from the Graafian follicle.
    R – It occurs during the follicular phase of the menstrual cycle.

  • 3)

    Assertion : Agrobacterium tumifaciens is popular in genetic engineering because this bacteriumis associated with the root nodules of all cereals and pulse crops
    Reason: A gene incorporated in the bacterial chromosomal genome gets atomatically transferred to the cross with which bacterium is associated.

  • 4)

    The prevention of large scale loss of biological interity

  • 5)

    Pedogenesis refers to

12th Standard Biology English Medium Free Online Test Creative 1 Mark Questions - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    During favourable conditions ______ shows multiple fission.

  • 2)

    Testosterone is secreted by ____

  • 3)

    Assertion (A): IUD's are inserted in the ovary.
    Reason (R): IUD's Increases phagocytosis of the sperm.

  • 4)

    The ZW - ZZ type of sex determination is seen ________.

  • 5)

    In gypsy moth we find _________ type of sex determination.

12th Standard Biology English Medium Free Online Test Creative One Mark Questions with Answer Key - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Giant Amoeba refers to ______

  • 2)

    Testosterone is secreted by ____

  • 3)

    This technique is used to diagnose the chromosomal abnormities.

  • 4)

    The gene responsible for ________ is inherited as an autosomal recessive lethal gene in man

  • 5)

    Pick out the odd man out.

12th Standard Biology English Medium Free Online Test Creative 1 Mark Questions - Part Two - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    In the geom line gene therapy, the genes are introduced into the______

  • 2)

    Statement 1:ADA deficiency was the first disease treated by gene therapy.
    Statement 2: ADA is an autosomal recessive metabolic disorder

  • 3)

    Cryopreservation of gametes of threatened species in viable and fertile condition can be referred to as

  • 4)

    DB is a standard abbreviation  used for the quantitative expression of

  • 5)

    Identify the incorrect statement.
    (i) EcoSan toilets is a sustainable way for handling human excreta by using dry composting toilets
    (ii) It reduces waste water generation
    (Ui) It is based on recovery and recycling of nutrients from excreta
    (iv) EcoSan toilets are used in several parts of India and Srilanka.

12th Standard Biology English Medium Free Online Test Creative One Mark Questions with Answer Key - Part Two - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    The site of infection for yersinia pestis is___________

  • 2)

    Infection of Ascariasis occur due to ___________________

  • 3)

    All the following are recombinant vaccines. Except

  • 4)

    Study the four statements (1 to 4) given below and select the two correct ones out of them.
    1) A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers.
    2) Predator starfish Pisaster helps in maintaining species diversity of some invertebrates.
    3) Predators ultimately lead to the extinction of prey species.
    4) Production of chemicals such as nicotine, strychnine by the plants is disordered.
    The two correct statements are

  • 5)

    Select the proper sequence indicating the increasing order of biodiversity.

12th Standard Biology English Medium Free Online Test Creative 1 Mark Questions - Part Three - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Technique used for cultivation of sponges is based on ______

  • 2)

    In _____ types of parthenogenesis egg can develop into individuals of any sex.

  • 3)

    ______ is a berry shaped duster of cells.

  • 4)

    The ruptured Graafian follicle forms ______

  • 5)

    Why is colostrum recommended to new born baby?

12th Standard Biology English Medium Free Online Test Creative One Mark Questions with Answer Key - Part Three - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Conjugation is seen in _____

  • 2)

    A few statements with regard to sexual reproduction are given below:
    i. Sexual reproduction does not always require two individuals
    ii. Sexual reproduction generally involves gametic fusion
    iii. Meiosis never occurs during sexual reproduction
    iv. External fertilization is a rule during sexual reproduction
    Choose the correct statements from the options below:

  • 3)

    Each testis is covered by a fibrous layer _____

  • 4)

    Which one of the following is not the function of placenta?

  • 5)

    The incubation period for _____ varies between 1-8 months.

12th Standard Biology English Medium Free Online Test Creative 1 Mark Questions - Part Five - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Isogamy is observed in ______

  • 2)

    ______ cells nourish the sperms.

  • 3)

    In gypsy moth we find _________ type of sex determination.

  • 4)

    The RNA polymerase of prokaryotes binds with ____________ factor to initiate polymerization.

  • 5)

    Continuous consumption of alcohol affects ___________

12th Standard Biology English Medium Free Online Test Creative One Mark Questions with Answer Key - Part Five - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Which among the following animals exhibit ovoviviparity?

  • 2)

    Match and select the correct option

    Column I Column II
    a. Proliferative phase 1. Breakdown of endometrium lining
    b. Secretory phase 2. Follicular phase
    c. Menstruation 3. Luteal phase

     

  • 3)

    Wodd Breast feeding week is observed during.

  • 4)

    In this Assisted Reproductive Technology (ART), the sperms and egg are allowed to united outside the body and then transformed into the woman's uterus.

  • 5)

    ABO blood group is a classical example for __________

12th Standard Biology English Medium Free Online Test Creative One Mark Questions with Answer Key - Part Four - by Suchitra - Gobichettipalayam - View & Read

  • 1)


    Identify the correct option to label the diagram
    1 - Archaeocytes
    2 - Inner membrane
    3 - Micropyle
    4 - Outer membrane
    5 - Monaxonspicules

  • 2)

    Which of the following is not required for any of the techniques of DNA finger printing available at present?

  • 3)

    The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challenge is called

  • 4)

    Which of the following is wrongly matched in the given table?

  • 5)

    For transformation, micro-particles coated with DNA to be bombarded with gene gun are made up of

12th Standard Biology English Medium Free Online Test Creative 1 Mark Questions - Part Four - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Gemmules are ______

  • 2)

    Attachment of blastocyst to the uterine wall is called ______

  • 3)

    This is not Major task of RCH.

  • 4)

    Depending on position of centromere and relative length of two arms human chromosomes can be classified into ________ type.

  • 5)

    ___________ used radioactive labelled molecules to prove that DNA is the genetic material.

12th Standard Botany English Medium Free Online Test One Mark Questions 2020 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    First cell of male gametophyte in angiosperm is

  • 2)

    Which of the following plant was introduced as a contaminant into India along with wheat?

  • 3)

    Identify the correct statement.

  • 4)

    The genotype of a plant showing the dominant phenotype can be determined

  • 5)

    Assertion (A): Test cross is done between F2 hybrid with F. recessive
    Reason (R): It helps to identify the homozygosity of hybrids

12th Standard Botany English Medium Free Online Test One Mark Questions with Answer Key 2020 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Arrange the layers of anther wall from locus to periphery

  • 2)

    A typical anther is ________________

  • 3)

    Observe the diagram and select the correct option mentioning the parts A, B, C and D

  • 4)

    The genotype of a plant showing the dominant phenotype can be determined

  • 5)

    Select the period for Mendel’s hybridization experiments

12th Standard Zoology English Medium Free Online Test One Mark Questions 2020 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Technique used for cultivation of sponges is based on ______

  • 2)

    Regeneration was first studied by _______

  • 3)

    The male homologue of the female clitoris is

  • 4)

    _____ are endocrine cells.

  • 5)

    Sperms are released into the cavity of the seminiferous tubule by a process called _____

12th Standard Zoology English Medium Free Online Test One Mark Questions with Answer Key 2020 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    During favourable conditions ______ shows multiple fission.

  • 2)

    Regeneration was first studied by _______

  • 3)

    Mammalian egg is

  • 4)

    _____ may be due to cancer of the ovary.

  • 5)

    The _____ contractions lead to false labour pains.

12th Standard Biology English Medium Free Online Test 1 Mark Questions 2020 - Part Five - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    The male homologue of the female clitoris is

  • 2)

    Identify the correct statements from the following

  • 3)

    Oral contraceptive pills contain synthetic ____ and hormones

  • 4)

    Assertion (A): IUD's are inserted in the ovary.
    Reason (R): IUD's Increases phagocytosis of the sperm.

  • 5)

    Mangolism is a genetic disorder which is caused by the presence of an extra chromosome number

12th Standard Biology English Medium Free Online Test 1 Mark Questions 2020 - Part Six - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    This is a method of sexual reproduction in which individuals of the same species temporarily write and exchange certain. amount of nuclear material and then get separated.

  • 2)

    Find the wrongly matched pair

  • 3)

    The _____ prevents poly spermy.

  • 4)

    Observe the diagram and select the correct option denoting the proper sequence of parts.

  • 5)

    Fatigue, jaundice, fever, rash, stomach pain, liver Cirrhosis and liver failure - are the symptoms of

12th Standard Biology English Medium Free Online Test One Mark Questions with Answer Key 2020 - Part Five - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    ______ is a berry shaped duster of cells.

  • 2)

    Statement (1): Menstrual cycle occurs once in every 29 days.
    Statement (2): The average age of menopause is 45-50 years.

  • 3)

    Identify the correct statement.

  • 4)

    Which of the following symbol is used in pedigree analysis to represent unspecified sex?

  • 5)

    How many structural genes are located in lac operon of E.Coli?

12th Standard Biology English Medium Free Online Test One Mark Questions with Answer Key 2020 - Part Six - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    According to WHO, India is the ____________ largest HIV affected country.

  • 2)

    Kin selection is seen in _______

  • 3)

    The codon _________ codes for phenylalanine

  • 4)

    AUG code is for ________

  • 5)

    The Neanderthal man had the brain capacity of

12th Standard Biology English Medium Free Online Test 1 Mark Questions 2020 - Part Seven - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    The male homologue of the female clitoris is

  • 2)

    The spermatids are transformed into mature sperms by a process called ______

  • 3)

    The foetal ejection reflex is also called ____ reflex.

  • 4)

    Which of the following contributes to the seminal plasma?
    (i) Cowper's gland
    (ii) Seminal vesicles
    (iii) Prostate gland
    (iv) Bulbourethral gland

  • 5)

    Match column I with column II and select the correct option from the codes given below.

    Column I Column II
    A. Copper releasing IUD (i) LNG-20
    B. Hormone releasing (ii) Lippes loop IUD
    C. Non medicated IUD (iii) Saheli
    D. Mini pills (iv) Multiload-375

12th Standard Biology English Medium Free Online Test One Mark Questions with Answer Key 2020 - Part Seven - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    All the following animals are continuous breeders, except.

  • 2)

    A few statements with regard to sexual reproduction are given below:
    i. Sexual reproduction does not always require two individuals
    ii. Sexual reproduction generally involves gametic fusion
    iii. Meiosis never occurs during sexual reproduction
    iv. External fertilization is a rule during sexual reproduction
    Choose the correct statements from the options below:

  • 3)

    The Androgen Binding Protein (ABP) is produced by

  • 4)

    The transfer of sperms by the male into the female genital tract is called _____

  • 5)

    The hormone _____ produced by anterior pituitary plays a major role in lactation.

12th Standard Biology English Medium Free Online Test 1 Mark Questions 2020 - Part Eight - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    ______ is a process by which the proglottids are cut off from the tapeworm.

  • 2)

    Find the wrongly matched pair

  • 3)

    Expulsion of baby from the mother's womb is called _____

  • 4)

    Which of the following statement is not correct?
    (i) Interstitial cells are seen surrounding the seminiferous tubule.
    (ii) Nurse cells secrete inhibin.
    (iii)Males have single prostate gland which encircles the urethra.
    (iv) Insemination, Fertilization, Implantation, Placentation, and Parturition.

  • 5)

    In embryo development of human beings, how long does it takes for a zygote to convert into morula?

12th Standard Biology English Medium Free Online Test One Mark Questions with Answer Key 2020 - Part Eight - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    In honey bees, the mode of reproduction is

  • 2)

    The site of embryo implantation is the

  • 3)

    The process which the sperm undergoes before penetrating the ovum is

  • 4)

    The ______ is the smallest human cell.

  • 5)

    The unequal divisions during oogenesis results in small cells called ______

12th Standard Biology English Medium Free Online Test 1 Mark Questions 2020 - Part Nine - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Budding is seen in ______

  • 2)


    Identify the correct option to label the diagram
    1 - Bud forming
    2 - Osculum
    3 - Bud growing
    4 - Daughter individual
    5 - Individual parent

  • 3)

    The process which the sperm undergoes before penetrating the ovum is

  • 4)

    The term after birth refers to ______

  • 5)

    Read the given statements and select the correct option
    and vaults are made of rubber and are inserted into the female reproductive tract to cover the cervix before coitus.
    Statement 2: They are chemical barriers of conception and are reusable.

12th Standard Biology English Medium Free Online Test One Mark Questions with Answer Key 2020 - Part Nine - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    The milk secreted by the mammary glands soon after child birth is called

  • 2)

    A contraceptive pill prevents ovulation by

  • 3)

    Which of the following is true about Rh factor in the offspring of a parental combination DdXDd (both Rh positive)?

  • 4)

    Which of the following statements about DNA replication is not correct?

  • 5)

    According to Darwin, the organic evolution is due to

12th Standard Biology English Medium Free Online Test 1 Mark Questions 2020 - Part Ten - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    The sexual union of young individuals produced immediately after the division of the parent Cellis called _____

  • 2)

    Which of the following types of asexual reproduction is noticed in Amoeba?

  • 3)

    The process which the sperm undergoes before penetrating the ovum is

  • 4)

    ______ is a hormone produced by sertoli cells.

  • 5)

    The hormone ____ brings about powerful contraction of uterine muscles during child birth.

12th Standard Biology English Medium Free Online Test One Mark Questions with Answer Key 2020 - Part Ten - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    All the following animals are continuous breeders, except.

  • 2)

    A few statements with regard to sexual reproduction are given below:
    i. Sexual reproduction does not always require two individuals
    ii. Sexual reproduction generally involves gametic fusion
    iii. Meiosis never occurs during sexual reproduction
    iv. External fertilization is a rule during sexual reproduction
    Choose the correct statements from the options below:

  • 3)

    Mammalian egg is

  • 4)

    A contraceptive pill prevents ovulation by

  • 5)

    Meselson and Stahl’s experiment proved

12th Standard Zoology - Reproduction in Organisms English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    In which type of parthenogenesis are only males produced?

  • 2)

    The mode of reproduction in bacteria is by

  • 3)

    Assertion and reasoning questions:
    In each of the following questions there are two statements. One is assertion (A) and other is reasoning (R). Mark the correct answer as
    Assertion: Viviparous animals give better protection to their off springs.
    Reason: They lay their eggs in the safe places of the environment

  • 4)

    Multiple fission is seen in _______

  • 5)

    Plasmotomy is observed in ________

12th Standard Zoology - Reproduction in Organisms English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Animals giving birth to young ones:

  • 2)

    Assertion and reasoning questions:
    In each of the following questions there are two statements. One is assertion (A) and other is reasoning (R). Mark the correct answer as
    Assertion: Offsprings produced by asexual reproduction are genetically identical to the parent.
    Reason: Asexual reproduction involves only mitosis and no meiosis

  • 3)

    In, dinoflagellates the types of asexual reproduction seen is _____

  • 4)

    During favourable conditions ______ shows multiple fission.

  • 5)

    Transverse binary fission is noticed in _________________

12th Standard Zoology - Human Reproduction English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    The male sex hormone testosterone is secreted from

  • 2)

    The Androgen Binding Protein (ABP) is produced by

  • 3)

    A – Ovulation is the release of ovum from the Graafian follicle.
    R – It occurs during the follicular phase of the menstrual cycle.

  • 4)

    Spermatid \(\overset { A }{ \rightarrow }\) Spermatozoa what does 'A' stands for?

  • 5)

    ______ is a berry shaped duster of cells.

12th Standard Zoology - Human Reproduction English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    The mature sperms are stored in the

  • 2)

    The glandular accessory organ which produces the largest proportion of semen is

  • 3)

    Colostrum is rich in

  • 4)

    Which one of the following menstrual irregularities is correctly matched?

  • 5)

    A – Head of the sperm consists of acrosome and mitochondria.
    R – Acrosome contains spiral rows of mitochondria.

12th Standard Zoology - Reproductive Health English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Which of the following is correct regarding HIV, hepatitis B, gonorrhoea and trichomoniasis?

  • 2)

    Identify the correct statements from the following

  • 3)

    Match column I with column II and select the correct option from the codes given below.

    Column I Column II
    A. Copper releasing IUD (i) LNG-20
    B. Hormone releasing (ii) Lippes loop IUD
    C. Non medicated IUD (iii) Saheli
    D. Mini pills (iv) Multiload-375
  • 4)

    Select the proper harmonal Composition of oral Contraceptive pills

  • 5)

    The family planning programme was initiated by India in _____

12th Standard Zoology - Reproductive Health English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Which of the following is correct regarding HIV, hepatitis B, gonorrhoea and trichomoniasis?

  • 2)

    Identify the correct statements from the following

  • 3)

    Match column I with column II and select the correct option from the codes given below.

    Column I Column II
    A. Copper releasing IUD (i) LNG-20
    B. Hormone releasing (ii) Lippes loop IUD
    C. Non medicated IUD (iii) Saheli
    D. Mini pills (iv) Multiload-375
  • 4)

    In ZIFT technique the zygote is transferred at the stage of ________

  • 5)

    In the year ______    india is expected to become the largest country in population size ______

12th Standard Zoology - Principles of Inheritance and Variation English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Haemophilia is more common in males because it is a

  • 2)

    Three children of a family have blood groups A, AB and B. What could be the genotypes of their parents?

  • 3)

    If the childs blood group is ‘O’ and fathers blood group is ‘A’ and mother’s blood group is ‘B’ the genotype of the parents will be

  • 4)

    A marriage between a colourblind man and a normal woman produces

  • 5)

    Pataus’ syndrome is also referred to as

12th Standard Zoology - Principles of Inheritance and Variation English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    ABO blood group in man is controlled by

  • 2)

    Which of the following phenotypes is not possible in the progeny of the parental genotypic combination IAIO X IAIB?

  • 3)

    What can be the blood group of offspring when both parents have AB blood group?

  • 4)

    The _______deals with the control of several inherited human diseases especially inborn errors of metabolism

  • 5)

    ZW-ZZ system of sex determination occurs in

12th Standard Zoology - Molecular Genetics English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Hershey and Chase experiment with bacteriophage showed that

  • 2)

    Which of the following is the correct sequence of event with reference to the central dogma?

  • 3)

    Which of the following statements is not true about DNA replication in eukaryotes?

  • 4)

    When lactose is present in the culture medium:

  • 5)

    The term gene was coined by ________

12th Standard Zoology - Molecular Genetics English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Hershey and Chase experiment with bacteriophage showed that

  • 2)

    Which of the following is the correct sequence of event with reference to the central dogma?

  • 3)

    Meselson and Stahl’s experiment proved

  • 4)

    One gene one enzyme hypothesis was proposed by Beadle and Tatum based on ________

  • 5)

    The term nucleic acid was coined by ________.

12th Standard Zoology - Evolution English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    The first life on earth originated

  • 2)

    Which of the following was the contribution of Hugo de Vries?

  • 3)

    The golden age of reptiles was

  • 4)

    Modern man belongs to which period?

  • 5)

    The solar system is estimated to be _______________years old.

12th Standard Zoology - Evolution English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Who published the book “Origin of species by Natural Selection” in 1859?

  • 2)

    The age of fossils can be determined by

  • 3)

    The Neanderthal man had the brain capacity of

  • 4)

    Carbon dioxide in the primitive earth is said to have been formed from ___________

  • 5)

    _____________ was not a part of theory of chemical evolution.

12th Standard Zoology - Human Health and Diseases English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    A 30 year old woman has bleedy diarrhoea for the past 14 hours, which one of the following organisms is likely to cause this illness?

  • 2)

    The sporozoites of Plasmodium vivax are formed from ________

  • 3)

    Spread of cancerous cells to distant sites is termed as

  • 4)

    B cells that produce and release large amounts of antibody are called

  • 5)

    _________is a non infective disease.

12th Standard Zoology - Human Health and Diseases English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Exo-erythrocytic schizogony of Plasmodium takes place in _______

  • 2)

    The sporozoite of the malarial parasite is present in ______

  • 3)

    AIDS virus has

  • 4)

    Rigidity of the Jaw muscle is a symptom of__________

  • 5)

    _______is a carrier for transmitting entamoeba

12th Standard Zoology - Microbes in Human Welfare English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Which of the following microorganism is used for production of citric acid in industries?

  • 2)

    Which of the following is not involved in nitrogen fixation?

  • 3)

    The purpose of biological treatment of waste water is to _______

  • 4)

    The enzyme________is got from Aspergillus.

  • 5)

    Lactobacillus helps to produce________

12th Standard Zoology - Microbes in Human Welfare English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Which of the following pair is correctly

  • 2)

    CO2 is not released during

  • 3)

    WorId Biofuel day is observed on_______

  • 4)

    Aspergillus niger helps to produce________

  • 5)

    __________is free living bacteria which acts as a biofertilizer.

12th Standard Zoology - Applications of Biotechnology English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    The first clinical gene therapy was done for the treatment of

  • 2)

    ELISA is mainly used for

  • 3)

    Recombinant Factor VIII is produced in the ______ cells of the Chinese Hamster

  • 4)

    Insulin was first isolated by_______

  • 5)

    Interferons are produced using________

12th Standard Zoology - Applications of Biotechnology English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Dolly, the sheep was obtained by a technique known as

  • 2)

    Transgenic animals are those which have

  • 3)

    Vaccines that use components of a pathogenic organism rather than the whole organism are called

  • 4)

    Alpha lactalbumin is a protein with___________minoacids.

  • 5)

    Interferons were discovered by________

12th Standard Zoology - Organisms and Population English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    All populations in a given physical area are defined as

  • 2)

    Match the following and choose the correct combination from the options given below.

    Column I Column II
    A. Mutalism 1. Lion and deer
    B. Commensalism 2. Round worm and man
    C. Parasitism 3. Birds compete with squirrels for nuts
    D. Competition 4. Sea anemone on hermit crab
    E. Predation 5. Bernacles attached to Whales.

     

  • 3)

    The relationship between sucker fish and shark is__________

  • 4)

    Some organisms are able to maintain homeostasis by physical means _______

  • 5)

    The word 'niche' was first used by __________

12th Standard Zoology - Organisms and Population English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Organisms which can survive a wide range of temperatuer are called

  • 2)

    The figure given below is a diagrammatic representation of response of organisms to abiotic factors. What do A, B and C represent respectively.

  • 3)

    What type of human population is represented by the following age pyramid?

  • 4)

    Which of the following is a behavioural adaptation?

  • 5)

    Birds sitting on cows to eat insects is an example of ____________

12th Standard Zoology - Biodiversity and its Conservation English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Which of the following region has maximum biodiversity

  • 2)

    Which one of the following is not coming under insitu conservation

  • 3)

    Assertion: The Environmental conditions of the tropics are favourable for speciation and diversity of organisms.
    Reason: The climate seasons, temperature, humidity and photoperiod are more or less stable and congenial.

  • 4)

    There are ________ mega biodiversity countries in the world

  • 5)

    _____________ is not a threat to biodiversity.

12th Standard Zoology - Biodiversity and its Conservation English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Conservation of biodiversity within their natural habitat is

  • 2)

    Which one of the following are at high risk extinction due to habitat destruction

  • 3)

    ___________ is a biographical gateway for much of India's flora and fauna.

  • 4)

    ________ is not a hotspot in India.

  • 5)

    At present there are ___________ tiger reserves in the country.

12th Standard Zoology - Environmental Issues English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Right to Clean Water is a fundamental right, under the Indian Constitution

  • 2)

    The use of microorganism metabolism to remove pollutants such as oil spills in the water bodies is known as

  • 3)

    The Hydrochlorofluorocarbons (HCFCs) are the compounds which have the following molecules:

  • 4)

    The tolerable level of sound is _____________

  • 5)

    The 2018 UN climate change conference was held in ___________

12th Standard Zoology - Environmental Issues English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    With which of the following, the Agenda 21’ of Rio Summit, 1992 is related to?

  • 2)

    The Ozone Day is observed every year on September 16 as on this day in 1987 the ___________was signed for launching efforts to arrest the depletion of the fragile ozone layer in the stratosphere that prevents the harmful ultra-violet rays of the sun from reaching the earth. Fill the correct word in blank.

  • 3)

    Oil spills can lead to ________________

  • 4)

    PCB is a major component of ______________

  • 5)

    DB is a standard abbreviation  used for the quantitative expression of

12th Standard Zoology - Immunology English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Colostrum provides

  • 2)

    All are peripheral lymphoid organs except

  • 3)

    B Cells are activated by

  • 4)

    B cells that produce and release large amounts of antibody are called

  • 5)

    Passive immunity does not exhibit this characteristic.

12th Standard Zoology - Immunology English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Paratope is an

  • 2)

    In agglutination and precipitation reactions, the antigen is a ______ and ______ respectively

  • 3)

    Raja is injured and got swelling. The swelling is due to the infection of tissue is an example of

  • 4)

    ______ is not a secondary lymphoid organ.

  • 5)

    Enhanced attachment is also known as ________

12th Standard Botany - Chromosomal Basis of Inheritance English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    The A and B genes are 10 cM apart on a chromosome. If an AB/ab heterozygote is testcrossed to ab/ab, how many of each progeny class would you expect out of 100 total progeny?

  • 2)

    Which of the following sentences are correct?
    1. The offspring exhibit only parental combinations due to incomplete linkage
    2. The linked genes exhibit some crossing over in complete linkage
    3. The separation of two linked genes are possible in incomplete linkage
    4. Crossing over is absent in complete linkage

  • 3)

    Due to incomplete linkage in maize, the ratio of parental and recombinants are

  • 4)

    Changing the codon AGC to AGA represents

  • 5)

    Which is not a feature of the chromosomal theory of inheritance?

12th Standard Botany - Asexual and Sexual Reproduction in Plants English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Choose the correct statement from the following

  • 2)

    Identify the incorrect pair

  • 3)

    Choose the correct statement(s) about tenuinucellate ovule

  • 4)

    The scar left by funiculus in the seed is

  • 5)

    The unit of reproductive structure used in vegetative propagation is called as __________________

12th Standard Botany - Asexual and Sexual Reproduction in Plants English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    An eminent Indian embryologist is

  • 2)

    Arrange the layers of anther wall from locus to periphery

  • 3)

    Which of the following represent megagametophyte

  • 4)

    Coelorhiza is found in

  • 5)

    Which of the following aquatic plant is popularly known as the "Terror of Bengal"?

12th Standard Botany - Classical Genetics English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a plant with the genotype

  • 2)

    Test cross involves

  • 3)

    Which Mendelian idea is depicted by a cross in which the F1 generation resembles both the parents

  • 4)

    In his classic experiments on Pea plants, Mendel did not use

  • 5)

    In a test cross involving F1 dihybrid flies, more parental type offspring were produced than the recombination type offspring. This indicates

12th Standard Botany - Classical Genetics English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a plant with the genotype

  • 2)

    Test cross involves

  • 3)

    The genotype of a plant showing the dominant phenotype can be determined

  • 4)

    In his classic experiments on Pea plants, Mendel did not use

  • 5)

    In a test cross involving F1 dihybrid flies, more parental type offspring were produced than the recombination type offspring. This indicates

12th Standard Botany - Chromosomal Basis of Inheritance English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    An allohexaploidy contains

  • 2)

    Accurate mapping of genes can be done by three point test cross because increases

  • 3)

    Genes G S L H are located on same chromosome. The recombination percentage is between L and G is 15%, S and L is 50%, H and S are 20%. The correct order of genes is

  • 4)

    Assertion (A): Gamma rays are generally use to induce mutation in wheat varieties.
    Reason (R): Because they carry lower energy to non-ionize electrons from atom

  • 5)

    Name the scientist(s) who rediscovered the Mendelian work?
    (i) Hugo de Vries
    (ii) Carl Correns
    (iii) Tschermak
    (iv) T.H. Morgan

12th Standard Botany - Principles and Processes of Biotechnology English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Restriction enzymes are

  • 2)

    Which one of the following palindromic base sequence in DNA can be easily cut at about the middle by some particular restriction enzymes?

  • 3)

    Which of the following one is used as a Biosensors?

  • 4)

    `In which techniques Ethidium Bromide is used?

  • 5)

    Which of the following person coined the term biotechnology?

12th Standard Botany - Principles and Processes of Biotechnology English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Plasmids are

  • 2)

    The process of recombinant DNA technology has the following steps
    I. amplication of the gene
    II. Insertion of recombinant DNA into the host cells
    III. Cutting of DNA at specific location using restriction enzyme .
    IV. Isolation of genetic material (DNA) Pick out the correct sequence of step for recombinant DNA technology.

  • 3)

    Assertion : Agrobacterium tumifaciens is popular in genetic engineering because this bacteriumis associated with the root nodules of all cereals and pulse crops
    Reason: A gene incorporated in the bacterial chromosomal genome gets atomatically transferred to the cross with which bacterium is associated.

  • 4)

    Some of the characteristics of Bt cotton are

  • 5)

    Zymology deals with __________

12th Standard Botany - Plant Tissue Culture English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Totipotency refers to

  • 2)

    Which of the following statement is correct

  • 3)

    Cryopreservation means it is a process to preserve plant cells, tissues or organs

  • 4)

    Which of the following condition favours callus induction?

  • 5)

    A widely used fusogen in protoplast culture is ________

12th Standard Botany - Plant Tissue Culture English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Micro propagation involves

  • 2)

    Select the incorrect statement from given statement

  • 3)

    Solidifying agent used in plant tissue culture is

  • 4)

    The production of secondary metabolites require the use of _________.

  • 5)

    Identify the correct sequence regarding steps involved in PTC

12th Standard Botany - Principles of Ecology English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Arrange the correct sequence of ecological hierarchy starting from lower to higher level.

  • 2)

    Which of the given plant produces cardiac glycosides?

  • 3)

    Read the given statements and select the correct option.
    Statement A : Cattle do not graze on weeds of Calotropis.
    Statement B : Calotropis have thorns and spines, as defense against herbivores.

  • 4)

    Read the following statements and fill up the blanks with correct option.
    i) Total soil water content in soil is called _________________
    ii) Soil water not available to plants is called _________________
    iii) Soil water available to plants is called

  • 5)

    The plant of this group are adapted to live partly in water and partly above substratum and free from water

12th Standard Botany - Principles of Ecology English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Ecology is the study of an individual species is called
    i) Community ecology
    ii) Autecology
    iii) Species ecology
    iv) Synecology

  • 2)

    Read the given statements and select the correct option.
    i) Hydrophytes possess aerenchyma to support themselves in water.
    ii) Seeds of Viscum are positively photoblastic as they germinate only in presence of light.
    iii) Hygroscopic water is the only soil water available to roots of plant growing in soil as it is present inside the micropores.
    iv) High temperature reduces use of water and solute absorption by roots

  • 3)

    Read the given statements and select the correct option.
    i) Loamy soil is best suited for plant growth as it contains a mixture of silt, sand and clay.
    ii) The process of humification is slow in case of organic remains containing a large amount of lignin and cellulose.
    iii) Capillary water is the only water available to plant roots as it is present inside the micropores.
    iv) Leaves of shade plant have more total chlorophyll per reaction centre, low ratio of chl a and chl b are usually thinner leaves.

  • 4)

    In soil water available for plants is

  • 5)

    Ophrys an orchid resembling the female of an insect so as to able to get pollinated is due to phenomenon of

12th Standard Botany - Ecosystem English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Which of the following is not a abiotic component of the ecosystem?

  • 2)

    Pond is a type of

  • 3)

    The following diagram represents

     

  • 4)

    Which of the following is not a sedimentary cycle

  • 5)

    Which group of organism occupies the third tropic level in an ecosystem?

12th Standard Botany - Ecosystem English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Which of the following is / are not a natural ecosystem?

  • 2)

    Solar energy used by green plants for photosynthesis is only

  • 3)

    Ecosystem consists of

  • 4)

    Significance of food web is / are

  • 5)

    Identify the incorrect option among the following component sequence.

12th Standard Botany - Environmental Issues English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Which of the following would most likely help to slow down the greenhouse effect.

  • 2)

    Find the wrongly matched pair.

  • 3)

    One green house gas contributes 14% of total global warming and another contributes 6%. These are respectively identified as

  • 4)

    Deforestation means

  • 5)

    ___________ is not a method of waste water treatment.

12th Standard Botany - Environmental Issues English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    With respect to Eichhornia
    Statement A: It drains off oxygen from water and is seen growing in standing water.
    Statement B: It is an indigenous species of our country.

  • 2)

    Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancer?

  • 3)

    Deforestation does not lead to

  • 4)

    People’s movement for the protection of environment in Sirsi of Karnataka is

  • 5)

    Which is not a greenhouse gas?

12th Standard Botany - Plant Breeding English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Assertion: Genetic variation provides the raw material for selection
    Reason: Genetic variations are differences in genotypes of the individuals.

  • 2)

    The quickest method of plant breeding is

  • 3)

    Plants having similar genotypes produced by plant breeding are called

  • 4)

    Dwarfing gene of wheat is

  • 5)

    A wheat variety, Atlas 66 which has been used as a donor for improving cultivated wheat, which is rich in

12th Standard Botany - Plant Breeding English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    While studying the history of domestication of various cultivated plants _______ were recognized
    earlier

  • 2)

    Match Column I with Column II
    Column I Column II
    i) William S. Gaud I) Heterosis
    ii) Shull II) Mutation breeding
    iii) Cotton Mather III) Green revolution
    iv) Muller and Stadler IV) Natural hybridization

  • 3)

    Desired improved variety of economically useful crops are raised by

  • 4)

    Which one of the following crop varieties correct matches with its resistance to a disease?

  • 5)

    Which of the following scientist developed world's first cotton hybrid?

12th Standard Botany - Economically Useful Plants and Entrepreneurial Botany English Medium Free Online Test One Mark Questions 2020 - 2021 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Consider the following statements and choose the right option.
    i) Cereals are members of grass family.
    ii) Most of the food grains come from monocotyledon.

  • 2)

    New world species of cotton

  • 3)

    Find out the correctly matched pair.

  • 4)

    Observe the following statements and pick out the right option from the following:
    Statement I: The drug sources of Siddha include plants, animal parts, ores and minerals.
    Statement II: Minerals are used for preparing drugs with long shelf-life.

  • 5)

    Which one of the following matches is correct?

12th Standard Botany - Economically Useful Plants and Entrepreneurial Botany English Medium Online Test 1 Mark Questions with Answer Key - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Assertion: Vegetables are important part of healthy eating.
    Reason: Vegetables are succulent structures of plants with pleasant aroma and flavours.

  • 2)

    Assertion: Turmeric fights various kinds of cancer
    Reason: Curcumin is an anti-oxidant present in turmeric

  • 3)

    Observe the following statements and pick out the right option from the following:
    Statement I – Perfumes are manufactured from essential oils.
    Statement II – Essential oils are formed at different parts of the plants.

  • 4)

    The active principle trans-tetra hydro canabial is present in

  • 5)

    Match the common names of the given plant species with their respective binomial

    (A) Paddy (I) Vigna radiata
    (B) Lady's finger  (II) Titicum aestivum
    (C) Wheat  (III) Oryza sativa
    (D) Green gram (IV) Abelmoschus esculentus

12th Standard Biology English Medium Model 5 Mark Creative Questions (New Syllabus 2020) - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Given an account on following terms.
    (a) Hologamy
    (b) Isogamy
    (c) Anisogamy
    (d) Merogamy
    (e) Paedogamy

  • 2)

    Describe the structure of human ovary.

  • 3)

    Write notes on any two techniques in Assisted Reproductive Technology (ART).

  • 4)

    Write a note on thalassemia.

  • 5)

    Describe Hershey and Chase experiment. What is concluded by their experiment?

12th Standard Biology English Medium Model 5 Mark Book Back Questions (New Syllabus 2020) - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Differentiate between the following:
    (a) Binary fission in amoeba and multiple fission in Plasmodium
    (b) Budding in yeast and budding in Hydra
    (c) Regeneration in lizard and Planaria

  • 2)

    Identify the given image and label its parts marked as a, b, c and d

  • 3)

    The procedure of GIFT involves the transfer of female gametes into the fallopain tube, can gametes be transferred to the uterus to achieve the same result? Explain.

  • 4)

    a) Identify the figure given below
    b) Redraw the structure as a replicating fork and label the parts
    c) Write the source of energy for this replication and name the enzyme involved in this process.
    d) Mention the differences in the synthesis of protein, based on the polarity of the two template strands.

  • 5)

    Mention any three similarities found common in Neanderthal man and
    Homo sapiens.

12th Standard Biology English Medium Sample 5 Mark Creative Questions (New Syllabus 2020) - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Explain parthenogenesis.

  • 2)

    Write a note a extra embryonic membranes.

  • 3)

    Give a detailed account on various natural methods of contraception.

  • 4)

    Write a note on allosomal chromosomal abnormalities.

  • 5)

    Describe Hershey and Chase experiment. What is concluded by their experiment?

12th Standard Biology English Medium Sample 5 Mark Book Back Questions (New Syllabus 2020) - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Differentiate between the following:
    (a) Binary fission in amoeba and multiple fission in Plasmodium
    (b) Budding in yeast and budding in Hydra
    (c) Regeneration in lizard and Planaria

  • 2)

    The following is the illustration of the sequence of ovarian events (a-i) in a human female.

    a) Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents.
    b) Name the ovarian hormone and the pituitary hormone that have caused the above-mentioned events.
    c) Explain the changes that occurs in the uterus simultaneously in anticipation.
    d) Write the difference between C and H.

  • 3)

    Open Book Assessment
    ‘Healthy reproduction, legally checked birth control measures and proper family planning programmes are essential for the survival of mankind’ Justify

  • 4)

    What is extra chromosomal inheritance? Explain with an example

  • 5)

    It is established that RNA is the first genetic material. Justify giving reasons.

12th Standard Biology English Medium Important 5 Mark Creative Questions (New Syllabus 2020) - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Write notes on binary fission in animals.

  • 2)

    Write a note a extra embryonic membranes.

  • 3)

    What is infertility and write its causes.

  • 4)

    Write a note on allosomal chromosomal abnormalities.

  • 5)

    List the salient features of genetic code.

12th Standard Biology English Medium Important 5 Mark Book Back Questions (New Syllabus 2020) - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Differentiate between the following:
    (a) Binary fission in amoeba and multiple fission in Plasmodium
    (b) Budding in yeast and budding in Hydra
    (c) Regeneration in lizard and Planaria

  • 2)

    Explain the role of oxytocin and relaxin in parturition and lactation.

  • 3)

    Amnicentesis, the foetal sex determination test, is banned in our country, Is it necessary? comment

  • 4)

    Discuss the genic balance mechanism of sex determination with reference to Drosophila.

  • 5)

    How is the two stage process of protein synthesis advantageous?

12th Standard Biology English Medium Model 3 Mark Creative Questions (New Syllabus) 2020 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Explain multiple fission in plasmodium.

  • 2)

    What is ovoviviparous condition?

  • 3)

    Write a short note on phases of life cycle.

  • 4)

    What is polymenorrhoea?

  • 5)

    Write any three statements on Sertoli cells

12th Standard Biology English Medium Model 3 Mark Book Back Questions (New Syllabus) 2020 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Why are the offsprings of oviparous animal at a greater risk as compared to offsprings of viviparous organisms?

  • 2)

    What is the composition of semen?

  • 3)

    Differentiate foeticide and infanticide

  • 4)

    Brief about female heterogamety

  • 5)

    A low level of expression of lac operon occurs at all the windows for treatment of various genetic disorders. Justify the statement

12th Standard Biology English Medium Sample 3 Mark Creative Questions (New Syllabus) 2020 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    What is repeated fission?

  • 2)

    Write a short note on phases of life cycle.

  • 3)

    What is LH surge?

  • 4)

    What are primary reproductive organs? What role does they play in organisms?

  • 5)

    May 28th is celebrated as annual Menstrual Hygiene Day (MHD). State its importance

12th Standard Biology English Medium Sample 3 Mark Book Back Questions (New Syllabus) 2020 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Give reasons for the following:
    (a) Some organisms like honey bees are called parthenogenetic animals
    (b) A male honey bee has 16 chromosomes where as its female has 32 chromosomes

  • 2)

    Name the hormones produced from the placenta during pregnancy.

  • 3)

    Differentiate foeticide and infanticide

  • 4)

    Explain male heterogamety

  • 5)

    Why tRNA is called an adapter molecule?

12th Standard Biology English Medium Important 3 Mark Creative Questions (New Syllabus) 2020 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Explain encystment in amoeba.

  • 2)

    Draw a gemmule and label any 2 parts.

  • 3)

    Give the definition for (a) Arrhenotoky (b) Thelytoky (c) Amphitoky

  • 4)

    'A' and 'B' are the male & female sex cells respectively which look alike and performs similar functions. 'A' and 'B' fuse to form a new individual 'D'. Which type of gametic fusion does this represent? Give an example

  • 5)

    What is the role of FSH & LH in spermatogenesis?

12th Standard Biology English Medium Important 3 Mark Book Back Questions (New Syllabus) 2020 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    The unicellular organisms which reproduce by binary fission are considered immortal. Justify

  • 2)

    What is the composition of semen?

  • 3)

    Give a schematic representation of spermatogenesis and oogenesis in humans.

  • 4)

    What are the strategies to be implemented in India to attain total reproductive health?

  • 5)

    Explain the genetic basis of ABO blood grouping man.

12th Biology English Medium Model 2 Mark Creative Questions (New Syllabus) 2020 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Define regeneration mention the types.

  • 2)

    During which stagesidoes multiple fission occur is plasmodium.

  • 3)

    Differentiate between transverse binary fission and longitudinal binary fission

  • 4)

    Repeated fission is a type of multiple fission. Yes or No? Why?

  • 5)

    What is Organogenesis?

12th Biology English Medium Model 2 Mark Book Back Questions (New Syllabus) 2020 - by Suchitra - Gobichettipalayam - View & Read

  • 1)

    Which type of reproduction is effective -Asexual or sexual and why?

  • 2)

    Draw a labeled sketch of a spermatozoan.

  • 3)

    Correct the following statements
    a) Transfer of an ovum collected from donor into the fallopian tube is called ZIFT.
    b) Transfering of an embryo with more than 8 blastomeres into uterus is called GIFT.
    c) Multiload 375 is a hormone releasing IUD.

  • 4)

    What is criss-cross inheritance?

  • 5)

    Mention any two ways in which single nucleotide polymorphism (SNPs) identified in human genome can bring revolutionary change in biological and medical science

View all

TN Stateboard Education Study Materials

TN Stateboard Updated Class 12th Biology Syllabus

Botany - Asexual and Sexual Reproduction in Plants

Introduction - Asexual Reproduction - Vegetative Reproduction - Sexual Reproduction - Pre-fertilization structure and events - Fertilization - Post fertilization structure and events - Apomixis - Polyembryony - Parthenocarpy

Botany - Classical Genetics

Introduction - Heredity and Variation - Mendelism - Laws of Mendelian Inheritance - Monohybrid, Dihybrid, Trihybrid cross, Backcross and Testcross - Interaction of Genes-Intragenic and Intergenic Incomplete dominance, Lethal genes, Epistasis - Polygenic inheritance in Wheat kernel colour, Pleiotropy - Pisum sativum - Extrachromosomal inheritance- Cytoplasmic inheritance in Mitochondria and Chloroplast.

Botany - Chromosomal Basis of Inheritance

Chromosomal theory of Inheritance - Linkage - Eye color in Drosophila and Seed color in Maize - Crossing over, Recombination and Gene mapping - Multiple alleles - Sex determination in plants - Mutation - types, mutagenic agents and their significance.

Botany - Principles and Processes of Biotechnology

Development of Biotechnology - Historical Perspective - Traditional Biotechnology - Advancements in Modern Biotechnology - Tools for Genetic Engineering - Methods of Gene transfer - Screening for Recombiants - Transgenic Plants / Genetically Modifi ed Crops - Applications of Biotechnology.

Botany - Plant Tissue Culture

Milestones in plant tissue culture - Basic concepts in plant disuse culture - Plant tissue culture techniques and types - Plant regeneration pathway - Applications of plant tissue culture - Conservation of plant genetic resources - Intellectual rights of property (IPR), Biosafety and Bioethics - Future Biotechnology

Botany - Principles of Ecology

Ecology - Ecological factors - Ecological adaptations - Dispersal of seeds and fruits

Botany - Ecosystem

Structure of ecosystem - Functions of ecosystem - Plant succession

Botany - Environmental Issues

Greenhouse effect, ozone depletion - Forestry - Deforestation - Afforestation - Alien invasive species - Conservation - Carbon Capture and Storage (CCS) - Rainwater harvesting - Environmental Impact Assessment (EIA) - Geographic Information System

Botany - Plant Breeding

Relationship between human and plants - Domestication of plants - Origin of agriculture - History of agriculture - Organic agriculture - Plant breeding - Conventional plant breeding methods - Modern plant breeding Techniques

Botany - Economically Useful Plants and Entrepreneurial Botany

Food Plants - Spices and Condiments - Fibre - Timber - Latex - Pulp wood - Dye - Cosmetics - Traditional system of medicines - Medicinal plants - Entrepreneurial Botany

Zoology - Reproduction in Organisms

Modes of reproduction - Asexual reproduction - Sexual reproduction

Zoology - Human Reproduction

Human reproductive system - Gametogenesis - Menstrual cycle - Fertilisation and implantation - Maintenance of pregnancy and embryonic development - Parturition and lactation

Zoology - Reproductive Health

Need for reproductive health Problems and strategies - Amniocentesis and its statutory ban - Social impact of sex ratio, female foeticide and infanticide - Population explosion and birth control - Medical termination of pregnancy (MTP) - Sexually transmitted diseases (STD) - Infertility - Assisted reproductive technologies (ART) - Detection of foetal disorders during early pregnancy

Zoology - Principles of Inheritance and Variation

Multiple alleles - Human blood groups - Genetic control of Rh factor - Sex determination in human, insects, and birds - Sex-linked inheritance - Karyotyping - Pedigree analysis - Mendelian disorders - Chromosomal abnormalities

Zoology - Molecular Genetics

Gene as the functional unit of inheritance - In search of the genetic material - DNA is the genetic material - Chemistry of nucleic acids - RNA world - Properties of genetic material - Packaging of DNA helix - DNA Replication - Transcription - Genetic code - tRNA – the adapter molecule - Translation - Regulation of Gene expression - Human Genome Project (HGP) - DNA finger printing technique

Zoology - Evolution

Origin of life - Evolution of life forms - Geological time scale - Biological evolution - Evidences for biological evolution - Theories of biological evolution - Mechanism of evolution - Hardy Weinberg principle - Origin and evolution of man

Zoology - Human Health and Diseases

Common diseases in human beings: Infectious and non-infectious - Maintenance of personal and public hygiene - Basic concepts of immunology - Immunodeficency diseases - Autoimmune diseases - Adolescence – Drug and alcohol abuse - Mental health – Depression

Zoology - Microbes in Human Welfare

Microbes in household products - Microbes in industrial products - Microbes in sewage treatment and energy generation - Microbes in the production of biogas - Microbes as bio-control agents and bio-fertilisers - Bioremediation

Zoology - Applications of Biotechnology

Applications in Medicine - Gene therapy - Stem Cell Therapy - Molecular Diagnosis - Transgenic Animals - Biological products and their uses - Animal cloning - Ethical issues

Zoology - Organisms and Population

Organism and its Environment - Habitat - Major Abiotic Components or Factors - Concept of Biome and Distribution - Responses to abiotic factors - Adaptations - Populations - Population attributes - Population age distribution - Growth models / Curves - Population regulation - Population interactions

Zoology - Biodiversity and its Conservation

Biodiversity - Importance of biodiversity – Global and India - Biogeographical regions of India - Threats to biodiversity - Causes of Biodiversity Loss - IUCN - Biodiversity and its conservation

Zoology - Environmental Issues

Pollution - Air Pollution - Water Pollution - Noise Pollution - Agrochemicals - Biomagnification - Eutrophication - Organic Farming and its Implementation - Solid Waste Management - Global Environment Change - Ozone Depletion - Deforestation - Ecosan Toilets - Peoples Participation in Conservation of Forests

Zoology - Immunology

Basic Concepts of Immunology - Innate Immunity - Acquired Immunity - Immune Responses - Lymphoid Organs - Antigens - Antibodies - Antigen - Antibody Interactions - Vaccines - Vaccination and Immunization - Hypersensitivity - Immunodeficiency Diseases - Autoimmune Diseases - Tumour Immunology

TN StateboardStudy Material - Sample Question Papers with Solutions for Class 12 Session 2019 - 2020

Latest Sample Question Papers & Study Material for class 12 session 2019 - 2020 for Subjects Maths, Chemistry, Physics, Computer Science, Business Maths, Economics, Commerce, Accountancy, History, Computer Applications, Computer Technology in PDF form to free download [ available question papers ] for practice. Download QB365 Free Mobile app & get practice question papers.

More than 1000+ TN Stateboard Syllabus Sample Question Papers & Study Material are based on actual Board question papers which help students to get an idea about the type of questions that will be asked in Class 12 Final Board Public examinations. All the Sample Papers are adhere to TN Stateboard guidelines and its marking scheme , Question Papers & Study Material are prepared and posted by our faculty experts , teachers , tuition teachers from various schools in Tamilnadu.

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