The secondary structure of a protein refers to

MCQ

A
fixed configuration of the polypeptide backbone
✓
$\alpha -$ helical backbone
C
hydrophobic interactions
D
sequence of $\alpha -$ amino acids

✓

Answer

Correct option: B.

$\alpha -$ helical backbone

b
Primary structure involves sequence of $C_{p}-C_{y}=28R$ amino acids polypeptide chain. Secondary structure involves $I_{1}$ helical backbone $I_{2}$ pleated sheet like structures. These structures are formed as a result of $H-$bonding between different peptide groups.

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