New ! Biology MCQ Practise Tests



Full Portion Three Marks Question Paper

12th Standard

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Biology

Time : 01:30:00 Hrs
Total Marks : 60
    20 x 3 = 60
  1. Why is the offspring formed by asexual reproduction referred as a clone?

  2. What is strobilation?

  3. How exogenous buds are developed by Hydra?

  4. Complete the flow chart by mentioning the ploidy of cells in boxes.

  5. What is Ferguson reflex?

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

  7. How is sex determined in human beings?

  8. Explain stabilizing, directional and disruptive selection with examples

  9. Differentiate between Somatic cell gene therapy and germline gene therapy

  10. Why is biodiversity so important and worthy of protection?

  11. What is Cantharophily.

  12. “Endothecium is associated with dehiscence of anther” Justify the statement

  13. What are restriction enzyme. Mention their type with role in Biotechnology.

  14. Why do submerged plants receive weak illumination than exposed floating plants in a lake?

  15. What are the human activities that disturb an ecosystem?

  16. Mention any three sources of carbon dioxide emission.

  17. A plant breeder developed a hybrid sugarcane by grafting two different varieties with desirable characters. The resultant hybrid showed excellent growth and productivity with increased sucrose content compared to its parental forms.
    (I) What does this phenomenon refers to?
    (il) How this condition can be maintained through further generation?

  18. What are millets? What are its types? Give example for each type.

  19. Why is an antibody molecule represented as H2 L2?

  20. Mention preventive measures for AIDS.

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