A

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Q. Out of proteins, lipids and carbohydrates present in a cell membrane, what is true?

  • (A) Lipids are maximum
  • (B) Carbohydrates are minimum
  • (C) Carbohydrates are maximum
  • (D) All three are in equal proportion
  • Correct Answer - Option(B)
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Explanation by: Admin

The cell membrane is primarily composed of lipids, proteins, and carbohydrates, but they are present in different proportions:

1. Lipids (Phospholipids & Cholesterol) - About 40-50%

Form the bilayer structure of the membrane.

Provide fluidity and permeability.

 

2. Proteins - About 50-60%

Function as transporters, receptors, enzymes, and structural components.

Can be integral (embedded) or peripheral (surface-bound).

 

3. Carbohydrates - About 5-10%

Found as glycoproteins or glycolipids on the outer surface.

Help in cell recognition, signaling, and immune response.

 


Since carbohydrates are the least abundant component of the cell membrane, option (B) is correct.

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