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In DNA, the complementary bases are:...

In `DNA`, the complementary bases are:

A

Uracil and adenine, cytosine and guanine

B

Adenine and thymine, guanine and cytosine

C

Adenine and thymine, guanine and uracil

D

Adenine and guanine, thymine and cytosine

Text Solution

Verified by Experts

The correct Answer is:
B
`DNA` is a dimeric polymer, in which two polynucleotide chains are entwined in a double helix On hydrolysis, it is found that although the ratio of bases vary from on `DNA` to another, the ratios of `C : G` and `A : T` are always `1 : 1` (or `C = G` and `A = T`) because the `C` and `A` in one strand always matches the `G` and `T` respectively in the other strand. This matching is called base-pairing which occurs by H-conding with maximum efficiency between a pyrimidine and a purine base, specifically between `A` and `T` and between `C` and `G`.
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