Suppose scientists develop a protocell with a membrane that allows all molecules to enter or leave the protocell via diffusion.Will this serve the function of a cell membrane?
A) Yes, because it allows molecules to cross down their concentration gradients.
B) No, because it facilitates molecules moving into and out of the protocell.
C) Yes, because the phospholipids assemble to form a complete sphere.
D) No, because it does not maintain an internal environment different from the external environment.
E) Yes, because it maintains a constant environment.

Question

Quizplus · Accepted Answer

A key function of a cell membrane is to maintain a distinct internal environment by selectively allowing substances to pass through, which a membrane allowing all molecules to enter or leave cannot achieve.

Suppose Scientists Develop a Protocell with a Membrane That Allows