CBSE 2026 Class 12 Biology Set 3 Question Paper with Solutions : Available Here

CBSE CLASS XII Questions

• 1.

  Identify the parts P, Q, R, S in the figure given below and select the option in the correct order.

  

  • P - Seed, Q - Thalamus, R - Mesocarp, S - Endocarp
    
  • P - Thalamus, Q - Seed, R - Endocarp, S - Mesocarp
    
  • P - Seed, Q - Thalamus, R - Endocarp, S - Mesocarp
    
  • P - Thalamus, Q - Seed, R - Mesocarp, S - Endocarp
    
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• 2.

  The foetal ejection reflex in human triggers the release of _______ hormone from _______

  • oxytocin, foetal pituitary
    
  • oxytocin, maternal pituitary
    
  • human chorionic gonadotropin, placenta
    
  • progesterone, corpus luteum
    
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• 3.

  Match Column-I with Column-II and choose the correct option:
  

  

  • a-i, b-ii, c-iii, d-iv
    
  • a-ii, b-v, c-i, d-iii
    
  • a-v, b-iv, c-ii, d-i
    
  • a-v, b-i, c-iv, d-ii
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• 4.

  Arrange the following in the correct sequence of their evolution and select the correct option:
  (i) Seaweed
  (ii) Invertebrates
  (iii) Jawless fish
  

  • (i), (ii), (iii)
  • (i), (iii), (ii)
  • (ii), (iii), (i)
  • (ii), (i), (iii)
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• 5.

  Assertion (A) : The population of melanized moths increased in areas after Industrial Revolution.
  Reason (R) : In Industrial environment lichen covered trees were replaced by soot-covered trees offering better camouflage to dark coloured moths.
  

  • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
    
  • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
    
  • Assertion (A) is true, but Reason (R) is false.
    
  • Assertion (A) is false, but Reason (R) is true.
    
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• 6.

  Monascus purpureus is a yeast used commercially in the production of which one of the following?

  • Ethanol
    
  • Streptokinase
    
  • Citric acid
    
  • Statins
    
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