In DNA molecule- which of the following is complementary base pair-Cytosine and adenineAdenine and thymineAdenine and guanineCytosine and thymine

The correct option is B Adenine and thymineThe double helical #160;DNA #160;is made up of a nitrogenous base, sugar, and phosphate. The nitrogenous bases ar ...

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Biology

Base Pairing

In DNA molecu...

Question

In DNA molecule, which of the following is complementary base pair?

Cytosine and adenine

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Adenine and thymine

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Adenine and guanine

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Cytosine and thymine

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Solution

The correct option is B Adenine and thymine
The double helical DNA is made up of a nitrogenous base, sugar, and phosphate. The nitrogenous bases are of two types purines and pyrimidines. Purines pairs with pyrimidines. Adenine pairs with thymine with help of double hydrogen bonds while guanine pairs with cytosine with help of triple hydrogen bonds.
So, the correct answer is option B.

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