Which of the following factors could cause the cell membrane to become less permeable?
A) If the channel proteins were to denature and become inactive.
B) If the molecules trying to enter the cell were decreased in size.
C) If the hydrophilic head of the phospholipids were to become hydrophobic while the hydrophobic tails become hydrophilic.
D) If the size of the protein channel was to increase.
E) All of these choices would cause the cell membrane to become less permeable.

Question

Quizplus · Accepted Answer

If the channel proteins were to denature and become inactive this would prevent the movement of small molecules through the membrane decreasing its permeability. Decreasing the size of the molecules entering the cell as well as the size of the protein channels would increase the permeability. If the phospholipid heads and tails were to change position the membrane would still retain the same permeability.

Which of the Following Factors Could Cause the Cell Membrane