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12th Standard English Medium Biology Reduced Syllabus Creative One mark Question with Answer key - 2021(Public Exam )

12th Standard

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Biology

Time : 02:00:00 Hrs
Total Marks : 50

    Part A

    50 x 1 = 50
  1. During favourable conditions ______ shows multiple fission.

    (a)

    Plasmodium

    (b)

    Amoeba

    (c)

    Planaria

    (d)

    Euglena

  2. Regeneration is not seen in ______

    (a)

    Starfish

    (b)

    Lizard

    (c)

    Hydra

    (d)

    Sea Anemone

  3. ______ is a seasonal breeder.

    (a)

    Poultry

    (b)

    Honey bees

    (c)

    Deers

    (d)

    Rabbit

  4. In honey bees, the unfertilized egg produces

    (a)

    Queen bee

    (b)

    Worker bee

    (c)

    Drones

    (d)

    Worker bee and male honey bee

  5. Fusion of morphologically and physiologically similar gametes is called ______

    (a)

    anisogamy

    (b)

    hologamy

    (c)

    isogamy

    (d)

    merogamy

  6. 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

    (a)

    i and ii

    (b)

    ii and iii

    (c)

    ii and iv

    (d)

    i and ii

  7. Egg laying hen is an example for _____________

    (a)

    Thelytoky

    (b)

    Ovovivipary

    (c)

    Vivipary

    (d)

    Ovipary

  8. The ______ glands in human female are homologous to the prostate gland in male.

    (a)

    Bartholin's glands

    (b)

    Skene's glands

    (c)

    mammary glands

    (d)

    Cowper's gland

  9. Capacitation is a _____ event.

    (a)

    physical

    (b)

    biochemical

    (c)

    both a and c

    (d)

    Enzyme mediated

  10. ______ stores the sperms temporarily until they mature.

    (a)

    testis

    (b)

    epididymis

    (c)

    vasa efferentia

    (d)

    vas deferens

  11. The _____ prevents poly spermy.

    (a)

    vitelline membrane

    (b)

    fertilization membrane

    (c)

    zona pellucida

    (d)

    corona radiata

  12. Several hormones like heG, hPL, oestrogen and progesterone are produced by

    (a)

    ovary

    (b)

    placenta

    (c)

    fallopian tube

    (d)

    pituitary

  13. Identify the correct sequence of reproductive events in human beings.

    (a)

    Insemination, Implantation, Fertilization, Parturition and Placentation

    (b)

    Implantation, Fertilization, Insemination, Placentation and Parturition.

    (c)

    Implantation, Insemination, Fertilization, Parturition and Placentation

    (d)

    Insemination, Fertilization, Implantation, Placentation and Parturition.

  14. Organ of copulation in human female is __________________

    (a)

    Cevix

    (b)

    Fundus

    (c)

    Vagina

    (d)

    Uterus

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

    (a)

    Statement 1 is correct; statement 2 is incorrect

    (b)

    Statement 1 is incorrect; statement 2 is correct

    (c)

    Both the statements 1 and 2 are correct

    (d)

    Both the statements 1 and 2 are incorrect.

  16. Identify the hormone which is produced only during the time of pregnancy

    (a)

    Relaxin

    (b)

    Oxytocin

    (c)

    Progesterone

    (d)

    Cortisol

  17. PAP smear can help to detect

    (a)

    Jaundice

    (b)

    Cancer

    (c)

    AIDS

    (d)

    Hepatitis B

  18. In India, Family Planning Programme was introduced in

    (a)

    1941

    (b)

    1951

    (c)

    1961

    (d)

    1971

  19. Foaming tablets and jellies are _____ barriers for birth control.

    (a)

    mechanical

    (b)

    Chemical

    (c)

    hormonal

    (d)

    natural

  20. In context of amniocentesis, which of the following statements is incorrect?

    (a)

    It is usually done when a woman is between 14-16 weeks pregnant

    (b)

    It is used for prenatal sex determination

    (c)

    It can be used for detection of Down syndrome

    (d)

    It can be used for detection of Cleft palate

  21. Legalized marriageable age of female in India is __________

    (a)

    19 years

    (b)

    20 years

    (c)

    18 years

    (d)

    21 years

  22. The blood group _________ is called universal recipient.

    (a)

    O

    (b)

    AB

    (c)

    B

    (d)

    A

  23. Scientists who contributed to karyotyping _______.

    (a)

    Tjio and Levan

    (b)

    John Cotto

    (c)

    Bridges

    (d)

    Wiener

  24. IA and IB genes of ABO blood group are __________

    (a)

    Co-dominant

    (b)

    Pleotropic

    (c)

    Dominant and recessive

    (d)

    Epistatic

  25. The concept of RNA world was independently proposed by __________

    (a)

    Orgel, Brick and Carl woese

    (b)

    Brick, Griffith and Crick

    (c)

    Wilkins and Franklin

    (d)

    Walter Gilbert

  26. Satellite DNA is important because it

    (a)

    codes for proteins needs in cell cycle

    (b)

    shows high degree of polymorphism in population and also the same degree of polymorphism in an individual, which is heritable from parents to children

    (c)

    Does not code for protein and is same in all members of the population.

    (d)

    Codes for enzymes needed for DNA replication.

  27. Assertion (A): Genophore is noticed in prokaryotes.
    Reason (R): Bacteria possess circular DNA without chromatin organisation.

    (a)

    Both A and R are correct

    (b)

    A is correct R is incorrect

    (c)

    R explains A

    (d)

    A is incorrect R is correct

  28. _____________ is called age of Invertebrates

    (a)

    Cambrian

    (b)

    Devonian

    (c)

    Pennsylvanian

    (d)

    Mississippian

  29. Mode of infection of cholera is__________

    (a)

    Droplet infection

    (b)

    through contaminated food and water

    (c)

    through wound infection

    (d)

    through wound infection

  30. Schizogony of Plasmodium parasite in human liver cells returns in ___________

    (a)

    sporozoites

    (b)

    merozoites

    (c)

    trophozoites

    (d)

    schizont

  31. A pair of fungal disease _____________

    (a)

    Amoebiasis, Kala-azar

    (b)

    Candidiasis, Athlete's foot

    (c)

    Ascariasis, Filariasis

    (d)

    Poliomyelitis, Amoebiasis

  32. The first bio herbicide was got from_______

    (a)

    Trichoderma

    (b)

    Phytophthora species

    (c)

    Bacillus

    (d)

    Aspergillus

  33. What gases are produced in anaerobic sludge digesters?

    (a)

    Methane and CO2 only

    (b)

    Methane, hydrogen sulphide and CO2

    (c)

    Methane, hydrogen sulphide and O2

    (d)

    Hydrogen sulphide and CO

    (e)

    Consumption of organic matter in the water is higher by the microbes

  34. Statement 1: Prebiotics are the compounds in food that induce the growth of beneficial microbes
    Statement 2: LAB is a probiotic

    (a)

    Statement 1 is correct. Statement 2 is incorrect.

    (b)

    Statement 1 is incorrect. Statement 2 is correct

    (c)

    Both the statements 1 and 2 are incorrect.

    (d)

    Both the statements 1 and 2 are correct

  35. The two chains of Insulin molecule are attached by_______

    (a)

    Covalent bonds

    (b)

    disulphide bonds

    (c)

    hydrogen bonds

    (d)

    both a and b

  36. Most popular sources of stem cells from their bank

    (a)

    amniotic cell bank

    (b)

    cord blood bank

    (c)

    plancenta blood bank

    (d)

    amniotic fluid cell bank

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

    (a)

    Silver or Platinum

    (b)

    Platinum or Zinc

    (c)

    Silicon or Platinum

    (d)

    Gold or Tungsten

  38. Identify the incorrect statement.
    (i) The first clinical gene therapy was given by French Anderson.
    (ii) For a four year old boy with ADA deficiency.
    (iii) ACD is a autosomal dominant metabolic disorder.
    (iv) Where patients have non-functioning B -lymphocytes.

    (a)

    i and iv only

    (b)

    ii, iii and iv

    (c)

    i, ii and iv

    (d)

    all the above

  39. "Birds and mammals attain greater body size in colder regions than warmer regions." - Choose the correct option.

    (a)

    Bergmann's rule

    (b)

    Jordon's rule

    (c)

    Sewall wright effect

    (d)

    Allen's rule

  40. Consider the following four conditions (A-D) and select the correct pair of them as adaptation to environment in desert lizards.
    The conditions:
    A) Burrowing in soil to escape high temperature.
    B) Losing heat rapidly from the body during high temperature
    C) Bask in sun when temperature is low
    D) Insulating body due to thick fatty dermis.

    (a)

    (A) and (C)

    (b)

    (B) and (D)

    (c)

    (A) and (B)

    (d)

    (C) and (D)

  41. Assertion (A): Snake is a stenotherm.
    Reason (R): Organism can tolerate narrow temperature fluctuations

    (a)

    Both A and R are correct R explain A

    (b)

    A is correct R is incorrect

    (c)

    R does not explain A

    (d)

    Both A and R are incorrect

  42. At present there are ___________ tiger reserves in the country.

    (a)

    9

    (b)

    32

    (c)

    47

    (d)

    26

  43. Kyoto protocol was held in Japan in ________________

    (a)

    1995

    (b)

    1997

    (c)

    2012

    (d)

    2017

  44. Eutrophication is a result of__________

    (a)

    Agricultural and sewage waste

    (b)

    Vehicle emission

    (c)

    Pesticides

    (d)

    Industrial effluent

  45. Which is not a part of mature seed?

    (a)

    Funiculus

    (b)

    Testa and tegma

    (c)

    hilum

    (d)

    Chalaza

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

    (a)

    A is correct R is incorrect.

    (b)

    R explains A.

    (c)

    Both A and R are incorrect.

    (d)

    Both A and R are correct. R does not explain A.

  47. Identify the correct sequence of anther wall layers from periphery towards core part.

    (a)

    Epidermis ⟶ endothelium ⟶ stomium ⟶ lapetum

    (b)

    Epidermis ⟶ middle layer ⟶ endothecium ⟶ endothelium

    (c)

    Epidermis ⟶ endothelium ⟶ middle layers ⟶ tapetum

    (d)

    Epidermis ⟶ endothelium ⟶ endothecium ⟶ tapetum

  48. Factor hypothesis was proposed by _________

    (a)

    Reginald Punnett

    (b)

    W. Bateson

    (c)

    Gregor Mendel

    (d)

    Carl Correns

  49. Identify the mutant variety of castor.

    (a)

    Sharbathi Sonora variety

    (b)

    Aruna variety

    (c)

    Reimei variety

    (d)

    Erectiferm variety

  50. Identify the plant tissue used for virus free germplasm

    (a)

    Apical meristem

    (b)

    Intercalary meristem

    (c)

    Lateral meristem

    (d)

    Plate meristem

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