7. Which of the following is true about membrane proteins embedded within the li

Question

7. Which of the following is true about membrane proteins embedded within the lipid bilayer? A) An increased temperature of the bilayer decreases the rate of transverse diffusion of the membrane protein. B) They undergo transverse diffusion approximately every 5 seconds at body temperature. C) They undergo transverse diffusion readily at body temperature unless their movement is restricted by other cellular components. D) As the temperature decreases, lateral diffusion of the membrane protein is restricted in bilayers with lipids which have longer chain fatty acids and fewer double bonds. E) Lateral diffusion of the membrane protein occurs independent of bilayer composition and temperature,

Explanation / Answer

The correct answer is option (D).

D) As the temperature decreases, lateral diffusion of the membrane protein is restricted in bilayers with lipids which have longer chain fatty acids and fewer double bonds.

Lateral diffusion refers to the lateral mevement of the lipids and proteins found in the membrane. When they are not restricted by any interactions membrane proteins are free to move in lateral diffusion. It is a quick and spontaneous process.

Transverse diffusion involves the movement of a lipid or protein from one membrane surface to other. Transverse diffusion ia a slow process as it requires energy for the diffusion to occur.

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