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Question
The correct statement(s) about the stability of double helix is(are):
1. presence of hydrogen bonds
2. presence of hydrophobic interaction
3. presence of hydrophilic interaction
4. vander waal force
The correct statement(s) about the stability of double helix is(are):
1. presence of hydrogen bonds
2. presence of hydrophobic interaction
3. presence of hydrophilic interaction
4. vander waal force
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Solution
The correct option is B 1, 2 only
The stability of double helix is due to the presence of hydrogen bond which involves hydrophobic interaction. The stability of the DNA double helix depends on a fine balance of interactions including hydrogen bonds between bases and surrounding water molecules, and base-stacking interactions between adjacent bases.
The heterocyclic bases of single-stranded DNA have polar amido, amidino, guanidino and carbonyl groups that form a complex network of hydrogen bonds with the surrounding water molecules.
Some of these bonds must be broken during duplex formation as the inter-base hydrogen bonds are formed.
The stability of double helix is due to the presence of hydrogen bond which involves hydrophobic interaction. The stability of the DNA double helix depends on a fine balance of interactions including hydrogen bonds between bases and surrounding water molecules, and base-stacking interactions between adjacent bases.
The heterocyclic bases of single-stranded DNA have polar amido, amidino, guanidino and carbonyl groups that form a complex network of hydrogen bonds with the surrounding water molecules.
Some of these bonds must be broken during duplex formation as the inter-base hydrogen bonds are formed.
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