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Vacuole in a plant cell

1. is membrane-bound and contains storage proteins and lipids
2. is membrane-bound and contains water and excretory substances
3. lacks membrane and contains air
4. lacks membrane and contains water and excretory substances

Correct answer: is membrane-bound and contains water and excretory substances

Solution

A plant vacuole is surrounded by a membrane called the tonoplast. It stores water, dissolved substances, and waste/excretory materials, helping maintain turgor pressure.

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