A) is membrane-bound and contains storey proteins and lipids
B) is membrane-bound and contains water and excretory substances
C) lacks membrane and contains air
D) lacks membrane and contains water and excretory substances
Correct Answer: B
Solution :
The cytoplasm of many plant and some animal cells contains numerous small or large sized, hollow, liquid filled structures, the vacuoles. The vacuoles of plant cells are bounded by a single semipermeable membrane known as tonoplast. These vacuoles contain water, phenol, flavonols, anthocyanins, alkaloids and storage products such as sugars and proteins. The vacuoles of animal cells are bounded by a lipoproteinaceous membrane and their function is storage, transmission of materials and maintenance of internal pressure of cell.
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