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

Option: 1

G17%, A 33%, T 33%


Option: 2

G 8.5%, A 50%, T 24.5%


Option: 3

G 34%, A 24.5%, T 24.5%


Option: 4

G 17%, A 16.5%, T 32.5%


Answers (1)

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The amount of adenine (A) = thymine (T) and cytosine (C) = guanine(G) bases in a specific species' DNA. The percentage of C and G is 17% equally and the rest 66% is shared by A & T, resulting in A = T = 33%.Therefore, C is 17%, G is 17%, A is 33%, and T is 33%.

Posted by

Sanket Gandhi

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