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If the percentage of adenine in the DNA of a human is 32%, what would...

Biology
WAEC 2025

If the percentage of adenine in the DNA of a human is 32%, what would be the percentage of thymine?

  • A. 10%
  • B. 16%
  • C. 32%
  • D. 27%
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Correct Answer: Option C
Explanation

If the percentage of adenine (A) in human DNA is 32%, the percentage of thymine (T) would also be 32%. 

This calculation is based on Chargaff's rules, which state that in a double-stranded DNA molecule, nitrogenous bases always pair in a specific manner:

  • Adenine (A) always pairs with Thymine (T) (A = T).
  • Guanine (G) always pairs with Cytosine (C) (G = C)
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