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Biology · PYQ NEET UG 2021

हिन्दी

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

  1. A
    T : 20 ; G : 25 ; C : 25
  2. B
    T : 20 ; G : 30 ; C : 20
  3. C
    T : 20 ; G : 20 ; C : 30
  4. D
    T : 30 ; G : 20 ; C : 20
View Answer & Solution

Correct answer · Option D

T : 30 ; G : 20 ; C : 20

Explanation

According to Chargaff's rules, \( A = T \) and \( G = C \). Since \( A = 30\% \), \( T = 30\% \). Remaining \( 40\% \) is divided equally between \( G \) and \( C \), so \( G = 20\% \) and \( C = 20\% \).
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