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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About Animal and Plant Cell
Animal and plant cells share a plasma membrane, cytoplasm, nucleus, ribosomes, mitochondria and endoplasmic reticulum, but plant cells also have a cellulose cell wall, chloroplasts and a large permanent vacuole. Questions cover organelle structure and function, differences between the two cell types, and how membranes control movement of substances.
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