Single Choice

The bond that determines the secondary structure of proteins is or secondary structure of protein is due to

ACoordinate bond
BCovalent bond
CHydrogen bond
Correct Answer
DPeptide bond

Solution

The bond that determines the secondary structure of proteins is $$\text{hydrogen bond.}$$ Depending on hydrogen bonding, two main types of secondary structure are$$\text{ α-helix and the β-sheet.}$$ The α-helix is a right-handed coiled strand. The side-chain substituents of the amino acid groups in an α-helix extend to the outside. Hydrogen bonds form between the $$\text{oxygen of the C=O of each peptide bond}$$ in the strand and the $$\text{hydrogen of the N−H group}$$ of the peptide bond four amino acids below it in the helix.
The hydrogen bonding in a β-sheet is between strands (inter-strand) rather than within strands (intra-strand). The sheet conformation consists of pairs of strands lying side-by-side.

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