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12th Standard Biology English Medium Free Online Test Creative One Mark Questions with Answer Key - Part Four

12th Standard

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Biology

Time : 00:10:00 Hrs
Total Marks : 10

    Answer all the questions

    10 x 1 = 10

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

    (a)

    1-A 2-D 3-B 4-C 5-E

    (b)

    1-C 2-B 3-A 4-E 5-D

    (c)

    1-D 2-E 3-B 4-C 5-A

    (d)

    1-A 2-E 3-D 4-B 5-C

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

    (a)

    Zinc finger analysis

    (b)

    Restriction enzymes

    (c)

    DNA-DNA hybridization

    (d)

    polymerase chain reaction

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

    (a)

    Natural selection

    (b)

    Convergent evolution

    (c)

    Non-random evolution

    (d)

    Adaptive radiation Human health and diseases

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

    (a)
    Microbe Product Application
    Trichoderma polysporum Cyclosporin A Immunosuppressive drug
    (b)
    Microbe Product Application
    Monascus purpureus Statins Lowering of blood cholesterol
    (c)
    Microbe Product Application
    Streptococcus Sterptockinase Removal of clot from blood vessel
    (d)
    Microbe Product Application
    Clostridium butylicum Lipase Removal of oil stains
  5. 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

  6. Assertion (A): Ozone layer protects the UV rays entering the Earth.
    Reason (R): UV rays may cause melanoma

    (a)

    A is right R is wrong

    (b)

    A is wrong R is right

    (c)

    Both A and Rare correct

    (d)

    R explains A

  7. How many characters studied by Mendel in pisum sativum

    (a)

    Three

    (b)

    Five

    (c)

    Seven

    (d)

    Nine

  8. Incomplete linkage was reported by Hutchinson in ___________

    (a)

    Drosophila

    (b)

    Maize

    (c)

    Neurospora

    (d)

    Lathyrus odoratus

  9. Identify the cryoprotectant

    (a)

    Dimethyl formamide

    (b)

    Fructose

    (c)

    Glycerol

    (d)

    Sodium alginate

  10. Assertion (A): Black pepper is a spice.
    Reason (R): Condiments are flavouring substances, generally added after the cooking of food.

    (a)

    A is right R is wrong

    (b)

    R explains A

    (c)

    Both A and R are right. R is not correct explanation for A.

    (d)

    Both A and R are wrong

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