If a DNA has a total of 50 nucleotides with 15 adenines. How many sets of triple bonds are present?
Correct answer: B. 10
- A. 15
- B. 10
- C. 30
- D. 20
Explanation
In DNA, the base pairing between adenine (A) and thymine (T) is established by two hydrogen bonds, while the base pairing between cytosine (C) and guanine (G) is established by three hydrogen bonds. Given that there are 15 adenines in the DNA, it means that there are also 15 thymines since A always pairs with T, which sums up to a total of 30 nucleotides.From the remaining 20 (50-30) nucleotides, the number of guanine and cytosine should be equal, which is 10-10.Each one forms one set of three hydrogen bonds with the other which means there will be 10 sets of three hydrogen bonds between guanine and cytosine. This is a tough question and has been added to help you fully prepare you for the AKU test.
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