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  4. The number of hydrogen bonds between adenine and thymine in a DNA molecule is

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Q. The number of hydrogen bonds between adenine and thymine in a DNA molecule is

Uttarkhand PMTUttarkhand PMT 2008

Solution:

In DNA, bases of two polynucleotide chains form hydrogen bonding with each other Adenine joins with thymine by two hyderogen bonds and cytocin joins with guanine base by three hydrogen bonds.