12th Biology - Term 1 Model Question Paper - by Antoney - Tiruppur Sep 21, 2019 - View & Download

• 1)

  Animals giving birth to young ones:

• 2)

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

• 3)

  Select the incorrect action of hormonal contraceptive pills from the following

• 4)

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

• 5)

  The total number of nitrogenous bases in human genome is estimated to be about

12th Zoology - Human Health and Diseases Two Marks Question - by Suchitra - Gobichettipalayam Sep 19, 2019 - View & Download

• 1)

  Given below are some human organs. Identify one primary and one secondary lymphoid organ. Explain its role. Liver, thymus, stomach, thyroid, tonsils.

• 2)

  What are interferons? Mention their role.

• 3)

  List out chemical alarm signals produced during inflammation.

• 4)

  Explain the process of replication of retrovirus after it gains entry into the human body.

• 5)

  Name the causal agent of African sleeping sickness and the vector.

12th Standard Zoology - Evolution Two Marks Question - by Suchitra - Gobichettipalayam Sep 19, 2019 - View & Download

• 1)

  List out the major gases seems to be found in the primitive earth.

• 2)

  Explain the three major categories in which fossilization occur?

• 3)

  Explain how mutations, natural selection and genetic drift affect Hardy Weinberg equilibrium.

• 4)

  How did Darwin explain fitness of organisms?

• 5)

  Mention the main objections to Darwinism.

12th Standard Zoology - Molecular Genetics Two Marks Question - by Suchitra - Gobichettipalayam Sep 19, 2019 - View & Download

• 1)

  Give reasons: Genetic code is ‘universal’.

• 2)

  Name the parts marked ‘A’ and ‘B’ in the given transcription unit:
  

• 3)

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

• 4)

  State any three goals of the human genome project.

• 5)

  Why is the term nucleic acid used for DNA and RNA?

12th Zoology - Principles of Inheritance and Variation Two Marks Question - by Suchitra - Gobichettipalayam Sep 19, 2019 - View & Download

• 1)

  What is haplodiploidy?

• 2)

  What is Lyonisation?

• 3)

  What is criss-cross inheritance?

• 4)

  Why are sex linked recessive characters more common in the male human beings?

• 5)

  What are holandric genes?

12th Zoology - Reproductive Health Two Marks Questions - by Suchitra - Gobichettipalayam Sep 16, 2019 - View & Download

• 1)

  What is amniocentesis? Why a statutory ban is imposed on this technique?

• 2)

  Select the correct term from the bracket and complete the given branching tree
  
  (Barriers, Lactational amenorrhoea, CuT, Tubectomy)

• 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)

  Which method do you suggest the couple to have a baby, if the male partner fails to inseminate the female or due to very low sperm count in the ejaculate?

• 5)

  Which type of women are benefited by Invitro fertilization?

12th Zoology - Human Reproduction Two Marks Questions - by Suchitra - Gobichettipalayam Sep 16, 2019 - View & Download

• 1)

  Mention the differences between spermiogenesis and spermatogenesis

• 2)

  Expand the acronyms
  a. FSH
  b. LH
  c. hCG
  d. hPL

• 3)

  How is polyspermy avoided in humans?

• 4)

  What is colostrum? Write its significance.

• 5)

  Draw a labeled sketch of a spermatozoan.

12th Zoology - Reproduction in Organisms Two Marks Questions - by Suchitra - Gobichettipalayam Sep 16, 2019 - View & Download

• 1)

  Name an organism where cell division is itself a mode of reproduction.

• 2)

  Name the phenomenon where the female gamete directly develops into a new organism with with an avian example

• 3)

  What is parthenogenesis? Give two examples from animals.

• 4)

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

• 5)

  What is plasmotomy?

12th Biology - Term 1 Five Mark Model Question Paper - by Suchitra - Gobichettipalayam Sep 16, 2019 - View & Download

• 1)

  What is the difference between syngamy and fertilization?

• 2)

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

• 3)

  Write the preventive measures of STDs.

• 4)

  Explain the inheritance of sex linked characters in human being.

• 5)

  List the common withdrawal symptoms of drugs and alcohol abuse.

12th Biology Quarterly Model Question Paper - by Suchitra - Gobichettipalayam Sep 13, 2019 - View & Download

• 1)

  In which type of parthenogenesis are only males produced?

• 2)

  During favourable conditions ______ shows multiple fission.

• 3)

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

• 4)

  A contraceptive pill prevents ovulation by

• 5)

  Which of the following phenotypes is not possible in the progeny of the parental genotypic combination I^AI^O X I^AI^B?

12th Zoology - Immunology Book Back Questions - by Suchitra - Gobichettipalayam Sep 10, 2019 - View & Download

• 1)

  AIDS virus has

• 2)

  All are peripheral lymphoid organs except

• 3)

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

• 4)

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

• 5)

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

12th Botany - Economically Useful Plants and Entrepreneurial Botany Book Back Questions - by Suchitra - Gobichettipalayam Sep 10, 2019 - View & Download

• 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)

  Tamarindus indica is indigenous to

• 3)

  New world species of cotton

• 4)

  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.

• 5)

  Which one of the following matches is correct?

12th Standard Botany - Ecosystem Book Back Questions - by Suchitra - Gobichettipalayam Sep 10, 2019 - View & Download

• 1)

  Profundal zone is predominated by heterotrophs in a pond ecosystem, because of

• 2)

  Solar energy used by green plants for photosynthesis is only

• 3)

  Which of the following ecosystem has the highest primary productivity?

• 4)

  Which one is in descending order of a food chain

• 5)

  Significance of food web is / are

TN 12th Standard Biology Official Model Question Paper 2019 - 2020 - by Suchitra - Gobichettipalayam Sep 10, 2019 - View & Download

12th Botany - Plant Breeding Book Back Questions - by Suchitra - Gobichettipalayam Sep 09, 2019 - View & Download

• 1)

  Pick out the odd pair

• 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)

  The quickest method of plant breeding is

• 4)

  Desired improved variety of economically useful crops are raised by

• 5)

  Plants having similar genotypes produced by plant breeding are called

12th Botany - Environmental Issues Book Back Questions - by Suchitra - Gobichettipalayam Sep 09, 2019 - View & Download

• 1)

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

• 2)

  Deforestation means

• 3)

  The unit for measuring ozone thickness

• 4)

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

• 5)

  The plants which are grown in silivpasture system are

12th Standard Botany - Principles of Ecology Book Back Questions - by Suchitra - Gobichettipalayam Sep 09, 2019 - View & Download

• 1)

  In soil water available for plants is

• 2)

  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

• 3)

  Pedogenesis refers to

• 4)

  Mycorrhiza promotes plant growth by

• 5)

  In a fresh water environment like pond, rooted autotrophs are

Botany - Plant Breeding Zoology - Environmental Issues Book Back Questions - by Suchitra - Gobichettipalayam Sep 09, 2019 - View & Download

• 1)

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

• 2)

  As per 2017 statistics, the highest per capita emitter of Carbon dioxide in the world is

• 3)

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

• 4)

  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.

• 5)

  Which among the following always decreases in a Food chain across tropic levels?

12th Zoology - Biodiversity and its Conservation Book Back Questions - by Suchitra - Gobichettipalayam Sep 09, 2019 - View & Download

• 1)

  Which of the following region has maximum biodiversity

• 2)

  The organization which published the red list of species is

• 3)

  Who introduced the term biodiversity?

• 4)

  Which of the following forests is known as the lungs of the planet earth?

• 5)

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

12th Standard Zoology - Organisms and Population Book Back Questions - by Suchitra - Gobichettipalayam Sep 07, 2019 - View & Download

• 1)

  All populations in a given physical area are defined as

• 2)

  Organisms which can survive a wide range of temperatuer are called

• 3)

  Which of the following is an r-species

• 4)

  The relationship between sucker fish and shark is__________

• 5)

  Animals that can move from fresh water to sea called as______

12th Zoology - Applications of Biotechnology Book Back Questions - by Suchitra - Gobichettipalayam Sep 07, 2019 - View & Download

• 1)

  Dolly, the sheep was obtained by a technique known as

• 2)

  How many amino acids are arranged in the two chains of Insulin

• 3)

  PCR proceeds in three distinct steps governed by temperature, they are in order of

• 4)

  ELISA is mainly used for

• 5)

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

12th Standard Zoology - Microbes in Human Welfare Book Back Questions - by Suchitra - Gobichettipalayam Sep 06, 2019 - View & Download

• 1)

  Cyclosporin – A is an immunosuppressive drug produced from _______

• 2)

  Which of the following bacteria is used extensively as a bio-pesticide?

• 3)

  Which of the following is not involved in nitrogen fixation?

• 4)

  The purpose of biological treatment of waste water is to _______

• 5)

  The gases produced in anaerobic sludge digesters are

12th Zoology - Human Health and Diseases Book Back Questions - by Suchitra - Gobichettipalayam Sep 06, 2019 - View & Download

• 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)

  Cirrhosis of liver is caused by chronic intake of ______

• 3)

  The sporozoite of the malarial parasite is present in ______

• 4)

  Spread of cancerous cells to distant sites is termed as

• 5)

  AIDS virus has

12th Standard Zoology - Evolution Book Back Questions - by Suchitra - Gobichettipalayam Sep 06, 2019 - View & Download

• 1)

  The first life on earth originated

• 2)

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

• 3)

  Fossils are generally found in

• 4)

  Which period was called “Age of fishes”?

• 5)

  The Neanderthal man had the brain capacity of

12th Botany - Plant Tissue Culture Book Back Questions - by Suchitra - Gobichettipalayam Sep 05, 2019 - View & Download

• 1)

  The time duration for sterilization process by using autoclave is ______ minutes and the temperature is _______

• 2)

  Which of the following statement is correct

• 3)

  The prevention of large scale loss of biological interity

• 4)

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

• 5)

  Solidifying agent used in plant tissue culture is

12th Zoology - Molecular Genetics Book Back Questions - by Suchitra - Gobichettipalayam Sep 05, 2019 - View & Download

• 1)

  Hershey and Chase experiment with bacteriophage showed that

• 2)

  What is the basis for the difference in the synthesis of the leading and lagging strand of DNA molecules?

• 3)

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

• 4)

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

• 5)

  Meselson and Stahl’s experiment proved

12th Botany - Principles and Processes of Biotechnology Book Back Questions - by Suchitra - Gobichettipalayam Sep 05, 2019 - View & Download

• 1)

  Restriction enzymes 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)

  pBR 322, BR stands for

• 4)

  Which of the following one is used as a Biosensors?

• 5)

  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.

12th Standard Zoology - Principles of Inheritance and Variation Book Back Questions - by Suchitra - Gobichettipalayam Sep 04, 2019 - View & Download

• 1)

  Haemophilia is more common in males because it is a

• 2)

  Which of the following phenotypes is not possible in the progeny of the parental genotypic combination I^AI^O X I^AI^B?

• 3)

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

• 4)

  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

• 5)

  XO type of sex determination and XY type of sex determination are examples of

12th Standard Botany - Chromosomal Basis of Inheritance Book Back Questions - by Suchitra - Gobichettipalayam Sep 04, 2019 - View & Download

• 1)

  An allohexaploidy contains

• 2)

  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?

• 3)

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

• 4)

  If haploid number in a cell is 18. The double monosomic and trisomic number will be

• 5)

  Changing the codon AGC to AGA represents

12th Standard Zoology - Reproductive Health Book Back Questions - by Suchitra - Gobichettipalayam Sep 03, 2019 - View & Download

• 1)

  Which one of the following groups includes sexually transmitted diseases caused by bacteria only?

• 2)

  A contraceptive pill prevents ovulation by

• 3)

  The approach which does not give the defined action of contraceptive is

• 4)

  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.

• 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 Zoology - Human Reproduction Book Back Questions - by Suchitra - Gobichettipalayam Sep 02, 2019 - View & Download

• 1)

  The mature sperms are stored in the

• 2)

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

• 3)

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

• 4)

  The process which the sperm undergoes before penetrating the ovum is

• 5)

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

12th Standard Botany - Classical Genetics Book Back Questions - by Suchitra - Gobichettipalayam Sep 02, 2019 - View & Download

• 1)

  Extra nuclear inheritance is a consequence of presence of genes in

• 2)

  In Mendel’s experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2 generation of the cross RRYY x rryy?

• 3)

  Test cross involves

• 4)

  Select the correct statement from the ones given below with respect to dihydrid cross

• 5)

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

12th Standard Botany - Asexual and Sexual Reproduction in Plants Book Back Questions - by Suchitra - Gobichettipalayam Aug 31, 2019 - View & Download

• 1)

  Choose the correct statement from the following

• 2)

  Identify the correctly matched pair

• 3)

  Arrange the layers of anther wall from locus to periphery

• 4)

  Assertion : Sporopollenin preserves pollen in fossil deposits
  Reason : Sporopollenin is resistant to physical and biological decomposition

• 5)

  Transmitting tissue is found in

12th Standard Zoology - Reproduction in Organisms Book Back Questions - by Suchitra - Gobichettipalayam Aug 30, 2019 - View & Download

• 1)

  In which type of parthenogenesis are only males produced?

• 2)

  Animals giving birth to young ones:

• 3)

  The mode of reproduction in bacteria is by

• 4)

  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

• 5)

  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

12th Standard Botany - Classical Genetics One Mark Question and Answer - by Suchitra - Gobichettipalayam Aug 29, 2019 - View & Download

• 1)

  Extra nuclear inheritance is a consequence of presence of genes in

• 2)

  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

• 3)

  How many different kinds of gametes will be produced by a plant having the genotype AABbCC?

• 4)

  How many characters studied by Mendel in pisum sativum

• 5)

  Mendel's work were rediscovered by__________

12th Standard Botany - Asexual and Sexual Reproduction in Plants One Mark Question with Answer Key - by Suchitra - Gobichettipalayam Aug 29, 2019 - View & Download

• 1)

  Choose the correct statement from the following

• 2)

  An eminent Indian embryologist is

• 3)

  Identify the correctly matched pair

• 4)

  Name the person who discovered the pollen tube?

• 5)

  Cleavage polyembryony is noticed in _________________

12th Zoology - Human Health and Diseases One Mark Question with Answer - by Suchitra - Gobichettipalayam Aug 28, 2019 - View & Download

• 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)

  Choose the symptom applicable for mumps

• 5)

  ___________is a pandemic disease

12th Zoology - Principles of Inheritance and Variation One Mark Question and Answer - by Suchitra - Gobichettipalayam Aug 27, 2019 - View & Download

• 1)

  Haemophilia is more common in males because it is a

• 2)

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

• 3)

  Which of the following phenotypes is not possible in the progeny of the parental genotypic combination I^AI^O X I^AI^B?

• 4)

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

• 5)

  The ABO blood group was discovered by ________.

12th Zoology - Molecular Genetics One Mark Question with Answer Key - by Suchitra - Gobichettipalayam Aug 27, 2019 - View & Download

• 1)

  Hershey and Chase experiment with bacteriophage showed that

• 2)

  DNA and RNA are similar with respect to

• 3)

  What is the basis for the difference in the synthesis of the leading and lagging strand of DNA molecules?

• 4)

  Chromosomes were first observed by ________.

• 5)

  The term nucleic acid was coined by ________.

12th Standard Zoology - Evolution One Mark Question and Answer - by Suchitra - Gobichettipalayam Aug 27, 2019 - View & Download

• 1)

  The first life on earth originated

• 2)

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

• 3)

  Darwin’s finches are an excellent example of

• 4)

  The age of fossils can be determined by

• 5)

  The term biogenesis was coined by

12th Zoology - Reproductive Health One Mark Question and Answer - by Suchitra - Gobichettipalayam Aug 26, 2019 - View & Download

• 1)

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

• 2)

  Which one of the following groups includes sexually transmitted diseases caused by bacteria only?

• 3)

  The approach which does not give the defined action of contraceptive is

• 4)

  Select the incorrect action of hormonal contraceptive pills from the following

• 5)

  Select the proper harmonal Composition of oral Contraceptive pills

12th Zoology - Human Reproduction One Mark Question Paper - by Suchitra - Gobichettipalayam Aug 24, 2019 - View & Download

• 1)

  The mature sperms are stored in the

• 2)

  The male sex hormone testosterone is secreted from

• 3)

  The site of embryo implantation is the

• 4)

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

• 5)

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

12th Zoology - Reproduction in Organisms One Mark Question Paper - by Suchitra - Gobichettipalayam Aug 23, 2019 - View & Download

• 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)

  Transverse Binary fission is seen is ______

• 5)

  In, dinoflagellates the types of asexual reproduction seen is _____

12th Botany - Principles and Processes of Biotechnology Model Questions Paper - by Suchitra - Gobichettipalayam Aug 20, 2019 - View & Download

• 1)

  Restriction enzymes are

• 2)

  Plasmids are

• 3)

  pBR 322, BR stands for

• 4)

  Which one of the following is not correct statement

• 5)

  An analysis of chromosomal DNA using the southern hybridisation technique does not use

12th Botany - Chromosomal Basis of Inheritance Model Question Paper - by Suchitra - Gobichettipalayam Aug 19, 2019 - View & Download

• 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)

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

• 3)

  Changing the codon AGC to AGA represents

• 4)

  The following sequence represents the location of genes in a chromosome. A - B - C - M - R - S - y -Z. Which of the gene pairs will have least chance of getting inherited together?

• 5)

  Identify the syntenic gene from the given genes sequence of a chromosome G-H-I-J-K-L-M-A-B

12th Botany - Classical Genetics Model Question Paper - by Suchitra - Gobichettipalayam Aug 12, 2019 - View & Download

• 1)

  Extra nuclear inheritance is a consequence of presence of genes in

• 2)

  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

• 3)

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

• 4)

  The genes controlling the seven pea characters studied by Mendel are known to be located on how many different chromosomes?

• 5)

  Among the following characters which one was not considered by Mendel in his experimentation pea?

12th Standard Botany - Asexual and Sexual Reproduction in Plants Important Question Paper - by Suchitra - Gobichettipalayam Aug 05, 2019 - View & Download

• 1)

  An eminent Indian embryologist is

• 2)

  Size of pollen grain in Myosotis

• 3)

  Assertion : Sporopollenin preserves pollen in fossil deposits
  Reason : Sporopollenin is resistant to physical and biological decomposition

• 4)

  Choose the correct statement(s) about tenuinucellate ovule

• 5)

  Which of the following represent megagametophyte

12th Standard Zoology - Evolution Model Question Paper - by Suchitra - Gobichettipalayam Aug 03, 2019 - View & Download

• 1)

  The phenomenon of “ Industrial Melanism” demonstrates

• 2)

  Who proposed the Germplasm theory?

• 3)

  Modern man belongs to which period?

• 4)

  The term biogenesis was coined by

• 5)

  _____________ was not a part of theory of chemical evolution.

12th Standard Biology First Mid Term Model Questions Paper - by Suchitra - Gobichettipalayam Aug 01, 2019 - View & Download

• 1)

  In which type of parthenogenesis are only males produced?

• 2)

  The site of embryo implantation is the

• 3)

  Co-dominant blood group is

• 4)

  Assertion (A): Zea mays is a monocotyledonous plant.
  Reason (R): Shield shaped cotyledon is called scutellum.

• 5)

  Assertion (A): DMH -11 is a transgenic mustard.
  Reason (R): It is developed by using bamase/ barstar technology.

12th Standard Biology Chapter 4 Principles of Inheritance and Variation Important Question Paper - by Suchitra - Gobichettipalayam Jul 30, 2019 - View & Download

• 1)

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

• 2)

  Which of the following phenotypes is not possible in the progeny of the parental genotypic combination I^AI^O X I^AI^B?

• 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)

  The inheritance of blood group is determined by multiple alleles as discovered by _________.

• 5)

  The__________ is called null allele.

12th Standard Zoology - Reproductive Health Important Question Paper - by Suchitra - Gobichettipalayam Jul 26, 2019 - View & Download

• 1)

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

• 2)

  Which one of the following groups includes sexually transmitted diseases caused by bacteria only?

• 3)

  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.

• 4)

  Select the incorrect action of hormonal contraceptive pills from the following

• 5)

  Select the proper harmonal Composition of oral Contraceptive pills

12th Standard Zoology - Human Reproduction Important Question Paper - by Suchitra - Gobichettipalayam Jul 24, 2019 - View & Download

• 1)

  The site of embryo implantation is the

• 2)

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

• 3)

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

• 4)

  Assertion (A): The acrosome of the Sperm cell contains Sperm lysin.
  Reason (R): Sperm lysin destroys the deformed Sperm cells.

• 5)

  _____ are endocrine cells.

12th Bio Zoology - Lesson 1 Important Question Paper - by Suchitra - Gobichettipalayam Jul 18, 2019 - View & Download

• 1)

  In which type of parthenogenesis are only males produced?

• 2)

  Animals giving birth to young ones:

• 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)

  During favourable conditions ______ shows multiple fission.

• 5)

  Plasmotomy is observed in ________

Biology 12th standard english medium frequently asked one mark questions - by Kavitha Jun 28, 2019 - View & Download

• 1)

  The gravid proglottids are cut off from the parent body in ______

• 2)

  Regeneration was first studied by _______

• 3)

  Regeneration was first studied in _______

• 4)

  Starfish shown ______ type of regeneration.

• 5)

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

creative multiple choice questions in 12th biology chapter one - by Kavitha Jun 28, 2019 - View & Download

• 1)

  Conjugation is seen in _____

• 2)

  Paedogamy is the sexual union of _____

• 3)

  ______ is a seasonal breeder.

• 4)

  Technique used for cultivation of sponges is based on ______

• 5)

  External fertilization is seen is ______

+2 english medium Important multiple choice questions in biology chapter one - by Kavitha Jun 28, 2019 - View & Download

• 1)

  In which type of parthenogenesis are only males produced?

• 2)

  Animals giving birth to young ones:

• 3)

  The mode of reproduction in bacteria is by

• 4)

  In which mode of reproduction variations are seen

• 5)

  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