CBSE Class 12 Biology Question Paper 2005 (3). Students can download the last year question papers using the link below. Free download of examination question papers with solutions.Last 10 year question papers should be practised to get better marks in examinations.
SECTION - A
Q1. Where are the pigments forming the photosynthesis located in the chloroplasts?
Q2. What does “leg” in leghaemoglobin refer to? Why this pigment is called oxygen-scavenger?
Q3. Name the category of regeneration, which involves the repattering of the whole body from small fragments. Name one animal in which it occurs.
Q4. Name the antifreeze compounds that help the fishes living in Antarctica in seawater even at temperature below 00 C.
Q5. What is tissue-typing in organ transplantation in humans’?
SECTION - B
Q6. What is oxidative decarboxylation of pyruvic acid? When does it occur?
Q7. A person is suffering from calcium deficiency in spite of taking a calcium rich diet. Explain how this condition may have occurred.
Q8. What is chloride shift? Explain.
Q9. How are the two heart sounds produced during cardiac cycle? Which one of these is of longer duration?
Q10. Mention any two differences between auxetic growth and multiplicative growth.
Q11. Give the collective term for chemicals such as hyaluronidase and arccosine.Where are they contained? Give the function of any one of them.
Q12. Name the two basic types of competition found amongst organisms.Which one these is more intense and why?
Q13. What does the term biodiversity refer to? Mention any two factors which pose threat to biodiversity.
Q14. What is acne? How acne is considered the commonest problem of almost all adolescents?
Q15. Define mutation.List the three way in which mutations can arise.
How is mutation breeding carried out for developing crop varieties?
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