AP Biology: Unit 2: Cells

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Question 2 · Unit 2: Cells · foundation

Identical animal cells with water-permeable membranes are placed in a solution with a lower concentration of nonpenetrating solutes than their cytoplasm. Assume equal temperature and pressure and no additional penetrating solutes. Which initial net change is expected?A. Water leaves and cells shrink.B. No water moves across the membrane.C. Water enters and cells swell.D. Solutes must enter through the lipid bilayer.

Question 10 · Unit 2: Cells · challenge

A spherical cell doubles its radius without changing shape. What happens to its surface-area-to-volume ratio?A. It doubles.B. It stays constant.C. It halves.D. It becomes four times larger.

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