In sea urchin DNA, which is double stranded, 17% of the bases were show to be cytosine. The percentages of the other three bases expected to be present in this DNA are

Options

A. G 17%, A 16.5%, T 32.5%
B. G 17%, A 33%, T 33%
C. G 8.5%, A 50%, T 24.5%
D. G 34%, A 24.5%, T 24.5%

Answer

B

Explanation

Amount of cytosine = Amount of guanine
17 % = 17 %
Amount of remaining base (ATT) = (100 – 35%) = 65%
Amount of A = Amount of T `= (65)/(2)` 33%