Question

Which of the following is the best definition for selectively permeable or semi permeable when referring to the cell membrane ? A. Allows any molecule or ion to move freely across the membrane B. Is able to detect the presence of certain molecules C. Has control over what molecules or ions can enter or leave the cell D. Has a semi conductive outer layer 

Answer 1

The cell membrane is selectively permeable, meaning it has control over what molecules or ions can enter or leave the cell.

Step-by-step explanation:

The best definition for selectively permeable or semi-permeable when referring to the cell membrane is that it has control over what molecules or ions can enter or leave the cell. The cell membrane is designed to be selectively permeable, allowing certain substances to pass through while restricting others. This selectivity is maintained through various mechanisms such as protein channels and transporters that regulate the movement of molecules.

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