Question

Choose the correct answer from the alternatives given.
Which statement is not true about the proteins in the plasma membrane?

• A. Proteins may be attached to the inner surface of the plasma membrane
• B. Hydrophobic portion of a proteinis embedded within the membrane
• C. Plasma proteins are responsible for membrane functions
• D. Glycoproteins contain carbohydrate chains that are oriented toward the inner surface of the membrane

Answer 1

The correct option is D Glycoproteins contain carbohydrate chains that are oriented toward the inner surface of the membrane

In the fluid mosaic model, the phospholipid bilayer has integrated as well as peripheral proteins embedded in it. The integrated proteins are found on the inside and span across the bilayer, while the peripheral proteins are found at the periphery of the lipid layers. This bilayer is composed of hydrophilic phosphate heads and hydrophobic tails. The hydrophobic portion of a protein is found embedded within the membrane. The glycoproteins contain carbohydrate chains that are oriented away from the inner surface of the membrane.

So, the correct answer is 'Glycoproteins contain carbohydrate chains that are oriented toward the inner surface of the membrane'.