ISC Class 12 Biology Important Questions

Biology is one of the most crucial subjects for most ISC class 12 students, particularly if they have plans to do higher studies in the biology stream or take up the medical profession. It imparts knowledge to the students about the different living organisms, their chemical and physical structures, functions, anatomy and more. Another benefit of these ISC Class 12 Important Questions is that it helps the students in their preparation for the competitive exams as well. We aim at providing the students with the best possible resources to help them prepare efficiently for both the ISC Class 12 examination and the competitive examinations.

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The Important Questions of ISC Class 12 Biology are given below:

  1. Describe the process of DNA replication in prokaryotes.
  2. If 10000 K cal energy is available at the level of producers, calculate the amount of energy at the level of secondary consumer.
  3. A snapdragon plant with red flowers was crossed with a plant with white flowers. It produced pink progeny in the F1 generation. Explain the principle of inheritance involved with the help of Punnett square.
  4. Classify the methods of contraception. Write short notes on any two of the methods mentioned by you.
  5. Expand the following terms and explain them briefly:
    1. GIFT
    2. ZIFT
    3. RCH
    4. ICSI
    5. IVF
  6. Explain the steps involved in downstream processing, in biotechnology.
  7. How has biotechnology been useful in controlling nematode infection in plants? Explain the technique involved in this process.
  8. Draw a labelled diagram of the T.S of the anther.
  9. Draw a labelled diagram of the LS of the anatropous ovule.
  10. State the measures to be taken by the owner of a dairy farm to improve the quality of milk and the quantity of its production.
  11. Give six features of the genetic code.
  12. Define the species-area relationship. What is the significance of the slope of regression? Show with the help of a graph.
  13. Differentiate between infectious diseases and non-infectious diseases. Give two examples of each.
  14. Explain the steps involved in artificial hybridization.
  15. What are the main objectives of plant breeding programmes?
  16. Mention any two properties of DNA that make it an ideal genetic material.
  17. Give two differences between Darwinism and the theory of mutation.
  18. Mention any one symptom of elephantiasis. Name its causative agent.
  19. In recent years, there has been a large scale loss of biodiversity. Mention four ways in which humans are responsible for it.
  20. State four measures taken by the government to control the high level of air pollution in cities.

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