MCQ
The secondary structure of a protein refers to
  • 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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