Question

The following is a segment of the primary structure of an α-helix: ...... – amino acid 1 – amino acid 2 – amino acid 3 – amino acid 4 – amino acid 5 – amino acid 6 – amino acid 7 – ..... Which amino acid residue forms a hydrogen bond with the backbone of amino acid 2 to stabilize the helix?

Answer 1

Answer:  The amino acid 6 will form the hydrogen bond with the backbone of amino acid 2

Explanation:

• The alpha helix is the common motif of protein secondary structure in which amino acids wind up to form a right hand-helix.
• In α-helix hydrogen bond form between carbonyl group of one amino acid and N-H group of four amino acid down the chain (that would be the 5th amino acid).
• These patterns of hydrogen bonding would make the helical patterns of polypeptide, each turn containing 3.6 amino acids.

Hoping this might be helpful...!