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Question

The most accepted nitrogen base composition for double stranded DNA is ____________.
  1. 31% A, 19% T, 31% C, 19%G
  2. 36% A, 36% U, 24% C, 24%G
  3. 48% A, 48% T, 52% C, 52%G
  4. 31% A, 31% T, 19% C, 19%G
  5. 24% A, 24% U, 36% C, 36%G

A
36% A, 36% U, 24% C, 24%G
B
31% A, 19% T, 31% C, 19%G
C
48% A, 48% T, 52% C, 52%G
D
31% A, 31% T, 19% C, 19%G
E
24% A, 24% U, 36% C, 36%G
Solution
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The correct option is D 31% A, 31% T, 19% C, 19%G

DNA base pairs are of 4types which together gives a ladder form of structure. Adenine with Thymine and Guanine with Cytosine together pairs up with each other.Adenine is 31% then Thymine is also 31%,then Cytosine is (50-31=19%), Guanine is also 19%.

So,the correct option is 'D'.

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