Question

which of the following is a characteristic of the cell membrane?
○ impermeable
○ semipermeable
○ fully permeable
○ not permeable

Explanation:

The cell membrane (plasma membrane) is known to be semipermeable. This means it allows certain substances to pass through while restricting the passage of others. An impermeable membrane would not allow any substances to pass, a fully permeable membrane would allow all substances to pass freely, and "not permeable" is similar to impermeable. The cell membrane's selective permeability (semipermeability) is crucial for maintaining the cell's internal environment by regulating the entry and exit of molecules like nutrients, waste, and ions.

Answer:

B. semipermeable (assuming the options are labeled as A: impermeable, B: semipermeable, C: fully permeable, D: not permeable)