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DNA

In a DNA doub...

Question

In a DNA double -helix , guanine and cytosine bases, shown above, are paired together by:

A

covalent bonds

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B

hydrogen bonds

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C

peptide bonds

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D

ionic bond

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Solution

The correct option is B hydrogen bonds
(B) hydrogen bond
In DNA, guanine is usually base - paired
via there hydrogen bonds with pyrimidine
cytosine

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Q. Read the passage carefully and answer the question given below.

In 1953, based on the data given by Maurice Wilkins and Rosalind Franklin, the famous double helix structure of DNA was proposed by James Watson and Francis Crick.

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Statement 1: The four nitrogen bases in a DNA molecule are guanine, thymine adenine, cytosine.

Statement 2: Where adenine and thymine are purines and guanine and cytosine are pyrimidines.

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