Which of the following is a selectively permeable membrane?
Correct answer: C. cell membrane
- A. cell wall
- B. cytoplasm
- C. cell membrane
- D. none of these
Explanation
The cell membrane is selectively permeable because its phospholipid bilayer and transport proteins allow some substances to cross while restricting others. The cell wall provides strength and is generally freely permeable, while cytoplasm is the internal material rather than the selectively permeable boundary. Students may choose the cell wall because it surrounds the cell, confusing structural support with selective transport.
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