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प्रश्न
How many hydrogen bonds form between adenine and thymine in complementary base pairing?
विकल्प
2 hydrogen bonds
3 hydrogen bonds
1 hydrogen bond
4 hydrogen bonds
MCQ
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उत्तर
Adenine (A) pairs with thymine (T) through exactly 2 hydrogen bonds. In contrast, guanine (G) pairs with cytosine (C) through 3 hydrogen bonds. These hydrogen bonds provide horizontal stability to the double helix while being weak enough to allow strand separation during DNA replication and transcription.
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