Question

1. which best describes a selectively permeable membrane?

a. lets everything pass
b. lets nothing pass
c. controls what enters and leaves the cell
d. stores energy as atp

Explanation:

To determine the correct answer, we analyze each option:

• Option A: A selectively permeable membrane does not let everything pass (e.g., it restricts certain substances), so A is incorrect.
• Option B: It does let some substances pass, so B is incorrect.
• Option C: The definition of a selectively permeable membrane is that it controls the movement of substances (what enters and leaves the cell), so this matches.
• Option D: Storing energy as ATP is a function of structures like mitochondria, not the role of a selectively permeable membrane, so D is incorrect.

Answer:

C. Controls what enters and leaves the cell