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

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

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

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

4. T : 20 ; G : 25 ; C : 25

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Answer: 3. T : 30 ; G : 20 ; C : 20

By Chargaff's rule A = T and G = C.

A = 30% so T = 30%. A + T = 60%, leaving 40% for G + C, so G = C = 20%.

Answer: T 30, G 20, C 20.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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