Question

Although the phospholipid molecules can be in constant lateral movement, they very rarely flip from one side of the bilayer to the other. Which of the following could explain this?

A., The molecular attraction between the fatty acid tails is too strong.
B., The head groups are too large to fit between the interior fatty acid tails.
C., The head groups are repelled by the hydrophobic membrane interior.
D., The cholesterol keeps the phospholipids on the correct side.

Answer 1

Answer: Option C

Explanation:

The cell membrane of the organism are semipermeable which means it allows  only some of the molecules to pass through the cell membrane. It structure of the cell membrane is made of phosphorous and lipids.

The two main regions of cell membrane is polar head region which is hydrophillic in nature and other region is the tail region which is non polar hydrophobic region.

The tail regions repeals the head region of the cell membrane.