Biology MCQs

11. Who among the following analysed the DNA for the first time ?
[A] Watson and Krick
[B] Karl von Frisch
[C] M. W. Nirenberg
[D] Hargobind Khurana

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12. Which of the following crops helps in nitrogen fixation?
[A] Rice
[B] Wheat
[C] Maize
[D] Beans

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13. Which organ is associated with the production of insulin in the human body?
[A] Pancreas
[B] Liver
[C] Kidney
[D] Heart

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14. Ticks and mites belongs to which of the following classes? (UPSC Prelims 2002)
[A] Arachnids
[B] Crustaceans
[C] Insects
[D] Myriapods

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15. Which among the following organs secrete bile juice?
[A] Liver
[B] Pancreas
[C] Stomach
[D] Large intestine

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16. Which branch of biology is known for the study of internal body structure?
[A] Anatomy
[B] Biometrics
[C] Pathology
[D] None of these

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17. The name of Theodor Schwann is associated with the discovery of which of the following?
[A] enzyme pepsin
[B] glial cells in nerves
[C] microorganisms play in alcohol fermentation
[D] All of the above

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18. What are cryptogamous plants?
[A] Flowerless plant
[B] Seedless Plant
[C] Reproduce by spores
[D] All of the above

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19. Which of the following is not a characteristic of Bryophyta?
[A] Motile sperms
[B] Presence of archegonium
[C] Presence of archegonium
[D] Photosynthetically independent sporophyte

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20. What is the role of indole acetic acid in plant growth?
[A] cell division and elongation
[B] tissue differentiation
[C] apical dominance
[D] All of the above

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