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NEET2021ZoologyMolecular Basis of InheritanceActual

If Adenine makes 30 % of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it?

Options

  1. AT :   20   ;   G :   30   ;   C :   20
  2. BT :   20   ;   G :   20   ;   C :   30
  3. CT :   30   ;   G :   20   ;   C :   20
  4. DT :   20   ;   G :   25   ;   C :   25

Correct answer

C. T :   30   ;   G :   20   ;   C :   20

Step-by-step solution

According to Chargaff's principle, A is equal to T and G is equal to C . Hence, if the total is 100 and A is 30 then T will also be 30 . Likewise G + C will be 40 , so, G = 20 , C = 20 .

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