Question

Which of the following statements is true

 A. All of these statements are true

 B. Membrane lipids rarely flip-flop between one monolayer and the other.

 C. None of these statements are true

 D. Fluidity of membranes can be moderated by the presence of cholesterol.

 E. Phospholipids will not spontaneously form liposomes in nonpolar solvents. 

 F. Transmembrane proteins diffuse laterally within the plane of the membrane.

Answer 1

Answer: Options B, D E, and F is the correct options

Explanation for correct options

B. In a membrane, the lipid can rotate and shift or move laterally inside a monolayer is known as flip-flop movement which is rarely occurring events.

D.  Cholesterol is an important constituent of animal cell membrane which is responsible for maintaining the rigidity and fluidity in the animal cell.

F.  Transmembrane proteins are amphipathic in nature having both hydrophobic and hydrophilic region. The hydrophobic regions of move through the membrane and interact in the interior of the bilayer with the hydrophobic tails of the lipid molecules, where they are uninhabited or sequestered away from water. The hydrophilic region of this transmembrane protein on either side of the cell membrane are exposed to water.

E. Phospholipids will not spontaneously form liposomes in a nonpolar solvents. Liposome formation takes place in an aqueous solution.