Which type of interactions are responsible for making the α− helix structure stable?
A
Peptide bonds between −NH2 and−CO groups of adjacent carbon chains
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B
Hydrogen bonds between −NH of amino acid in one turn with −CO of amino acid to adjacent turn
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C
−OH group of one amino acid with −CO group of other amino acids on the turn
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D
Hydrogen bonds between adjacent amino acids
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Solution
The correct option is B Hydrogen bonds between −NH of amino acid in one turn with −CO of amino acid to adjacent turn
α-helix structures are held in shape by hydrogen bonds, which form between the carbonyl O of one amino acid and the amino H of another amino acid which make it stable.