RE-NEET2026Chemistry-Biomolecules
RE-NEET 2026 Chemistry Proteins MCQ Question
Type: MCQ-conceptual-Medium-Class 12
The correct statement about peptides and proteins is
A
Only the proteins having a quaternary structure are biologically active.
B
In β-pleated sheet structures, peptide chains are held together by intermolecular hydrogen bonds.
C
In α-helices, the polypeptide chain is twisted into a left-handed screw (helix) through intramolecular hydrogen bonds.
D
Tertiary structure of proteins has two or more polypeptide subunits.
Correct Answer
Option B
Detailed Explanation
In β-pleated sheets, hydrogen bonds form between different segments of the polypeptide chain, stabilizing the structure.
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