Which of the following is correct for the cell wall:
Correct answer: C. Permeable
- A. Semi-permeable
- B. Differentially permeable
- C. Permeable
- D. Not permeable
Explanation
The cell wall is dead and fully permeable. It cannot regulate the entry of solvent or solute molecules. This fact is established by the accumulation of water and mineral salts in the periplasmic space, which is the space between the cell wall and the cell membrane. If the cell wall was semi or differentially permeable; mineral salts would not have accumulated in the periplasm.
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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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