Question 1 / 2:  If the percentage of adenine is 20 in a cell, what will be the percentage of guanine in that cell?
A  20
B  30
C  60
D  80
E  40
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Explanation:

In a cell, percentage of adenine is equal to that of thymine while percentage of cytosine is equal to that of guanine.

If adenine(A) is 20%, thymine(T) will also be 20%.

So we are left with 60% for cytosine(C) and guanine(G). Both should be 30% each.

Therefore, the correct answer is 30%.

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