The large central vacuole of a mature plant cell is bounded by a membrane called the
Correct answer: A. tonoplast
- A. tonoplast
- B. plasmalemma
- C. nuclear envelope
- D. cell wall
Explanation
The tonoplast controls what enters and leaves the cell sap, and the vacuole's contents create the osmotic pressure that keeps the cell turgid and so supports the non woody parts of a plant. It also stores sugars, salts, pigments and waste products. The plasmalemma is the plasma membrane at the cell surface, and the cell wall outside it is not a membrane at all.
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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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