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Question
In a DNA sample, if the percentage of cytosine is 18%, then percentage of adenine will be
In a DNA sample, if the percentage of cytosine is 18%, then percentage of adenine will be
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Solution
The correct option is A 32%
In a DNA molecule the amount of purines is equal to the amount of pyrimidines. Purines are adenine and guanine, Pyrimidine are cytosine and thymine. The number of adenines is always equal to the number of thymines, and the number of cytosines is always equal to that of guanine.
A = T, C = G
If C = 18% , then G = 18% C + G =36%
So, A + T = 100 – 36 = 64% A = 32%, T = 32%
So, adenine is 32%.
In a DNA molecule the amount of purines is equal to the amount of pyrimidines. Purines are adenine and guanine, Pyrimidine are cytosine and thymine. The number of adenines is always equal to the number of thymines, and the number of cytosines is always equal to that of guanine.
A = T, C = G
If C = 18% , then G = 18% C + G =36%
So, A + T = 100 – 36 = 64% A = 32%, T = 32%
So, adenine is 32%.
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