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NEET 2021
Exam
NEET
Year
2021
Subject
Zoology
Chapter
Molecular Basis of Inheritance

NEET 2021 · Zoology · Molecular Basis of Inheritance

If Adenine makes 30 % of the DNA molecule, what will be the...

If Adenine makes 3030 % of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it?

Options

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

Correct answer

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

Step-by-step solution

According to Chargaff's principle, AA is equal to TT and GG is equal to CC. Hence, if the total is 100100 and AA is 3030 then TT will also be 30.30 . Likewise G+CG + C will be 40,40, so, G=20,C=20G = 20, C = 20.
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