JAMB Biology 2011 Objective — Question 60
Question 60 of 60 from the Joint Admissions and Matriculation Board (JAMB) Biology 2011 Objective paper, with the correct answer and a full explanation.
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Adenine pairs with thymine because
- A. A. the two occur in the same nucleic acid
- B. B. one is a strong base and the other a weak base
- C. C. two purine bases easily pair up
- D. D. one is a purine and the other a pyrimidineCorrect
Explanation
Guanine and adenine are purines; cytosine and thymine are pyrimidines. A purine always pairs with a pyrimidine (adenine-thymine, guanine-cytosine).
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