WAEC Biology 2025 Objective — Question 46
Question 46 of 50 from the West African Examinations Council (WAEC) Biology 2025 Objective paper, with the correct answer and a full explanation.
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If the percentage of adenine in the DNA of a human is 32%, what will be the percentage of thymine in the DNA?
- A. 10%
- B. 16%
- C. 27%
- D. 32%Correct
Explanation
In DNA, adenine (A) pairs with thymine (T) in a 1:1 ratio (Chargaff's rule). So if Adenine = 32%, then Thymine = 32%.
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