CBSE Class 12 Computer Science Question Paper 2023 with Answer Key (March 23, Set 4 - 91)

CBSE CLASS XII Questions

• 1.

  A DNA molecule is 160 base pairs long. It has 30% Guanine. How many Adenine bases are present in this DNA molecule?

  • 48
    
  • 64
    
  • 96
    
  • 192
    
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• 2.

  Two statements are given below. They are Assertion (A) and Reason (R). Read both the statements carefully and choose the correct option. Assertion (A): In recent decades, the urban population of India has grown rapidly. Reason (R): In India, the workforce is shifting from farm-based to non-farm-based occupations.
  

  • Both (A) and (R) are true and (R) is the correct explanation of (A).
    
  • Both (A) and (R) are true, but (R) is not the correct explanation of (A).
    
  • (A) is true, but (R) is false.
    
  • (A) is false, but (R) is true.
    
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• 3.

  Choose the correctly matched pair from the following : (Crop) - (Leading Producer State)

  • Maize - Bihar
    
  • Jute - West Bengal
    
  • Groundnut - Rajasthan
    
  • Sunflower - Punjab
    
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• 4.

  Which one of the following is the main objective of 'Haryali Project'?

  • Water conservation for irrigation and fisheries
    
  • Water conservation for industries
    
  • Surface water availability for transport
    
  • Surface water availability for recreation
    
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• 5.

  Read the following statements carefully regarding Al-Biruni’s ‘‘Kitab-ul-Hind’’ and choose the correct option :
  I. It is a voluminous text of eighty chapters.
  II. It is written in Arabic, Urdu and Hindavi.
  III. Each of its chapters begins with a question.
  IV. It covers many subjects like astronomy, festivals, etc.
  

  • I, III and IV are correct.
    
  • I, II and III are correct.
    
  • I, II and IV are correct.
    
  • II, III and IV are correct.
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• 6.

  Suggest how a virus-free healthy plant can be obtained from a diseased sugarcane plant.

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