STANDARDChemistry-Biomolecules
STANDARD Chemistry Protein Structure MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Most common types of secondary structures of proteins are
A
α-helix and β-helix structures
B
α-helix and β-pleated sheet structures
C
right and left hand twisted structures
D
globular and fibrous structures.
Correct Answer
Option B
Detailed Explanation
Due to regular folding of backbone of the peptide chain, two most common secondary structures of proteins are α-helix and β-pleated structures. In α-helix, all H-bonds are formed by twisting the chain into a right handed helix. In β-pleated, all peptide chains are stretched to maximum extension and then laid side by side and connected by hydrogen bonds.
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