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DNA Structure and Replication

Q1: In DNA double helix, the two DNA chains are held together by

A covalent bonds between the pair of bases

B hydrogen bonds between the pair of bases

C ionic bonds between the pair of bases

D none of the above

ANS:B - hydrogen bonds between the pair of bases

Bases are pair by hydrogen bond adenine & thymine by 2 hydrogen bond, cytosine & guanine by 3 hydrogen bond.



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