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Biology · PYQ NEET UG 2026

हिन्दी

The correct statement about peptides and proteins is

  1. Tertiary structure of proteins has two or more polypeptide subunits.
  2. Only the proteins having a quaternary structure are biologically active.
  3. In \( \beta \)-pleated sheet structures, peptide chains are held together by intermolecular hydrogen bonds.
  4. In \( \alpha \)-helices, the polypeptide chain is twisted into a left-handed screw (helix) through intramolecular hydrogen bonds.

Correct answer · Option 3

In \( \beta \)-pleated sheet structures, peptide chains are held together by intermolecular hydrogen bonds.

Explanation

In \( \beta \)-pleated sheet structures, neighboring peptide chains are held together by intermolecular hydrogen bonds.
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