The GATE Grind

GATE 2019 BT – Question 36

General Biology · Biochemistry: Biomolecules, biological membranes, channels and pumps, molecular motors, action potential and transport · 2 marks · Multiple choice

In general, which statement is NOT CORRECT?

  1. Hydrogen bonds result from electrostatic interactions.
  2. Hydrogen bonds contribute to protein folding energy.
  3. Hydrogen bonds are weaker than van der Waals interactions.
  4. Hydrogen bonds are directional.

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Show answer and explanation

Correct answer: (C) Hydrogen bonds are weaker than van der Waals interactions.

Explanation

An individual hydrogen bond is generally stronger than an individual weak van der Waals contact and has a preferred geometry. It contributes to protein structure and has an important electrostatic component. Thus C reverses the usual interaction-strength comparison. Many weak contacts together can still make a large stabilizing contribution.

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