Cell Structure and Function MCQ Quiz: GKFix - Bridge of Knowledge - Page 209

Question 1041

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What is the function of contractile vacuoles in Amoeba?

Photosynthesis
Energy production
Nutrient storage
Osmoregulation and excretion

Question 1042

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How does the tonoplast affect ion concentration in the vacuole?

It prevents ion entry
It allows free diffusion of ions
It neutralizes ions
It transports ions against gradients

Question 1043

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What percentage of a plant cell's volume can be occupied by the vacuole?

Up to 20%
Up to 50%
Up to 70%
Up to 90%

Question 1044

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What surrounds the vacuole in a cell?

Plasma membrane
Double membrane
Cell wall
Tonoplast

Question 1045

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At what pH are lysosomal enzymes most active?

Basic pH
Neutral pH
Variable pH depending on substrate
Acidic pH