Transport across membranes and osmosis Quiz
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5 questions, one answer each
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1. Which has the highest water potential?
- A. Pure water
- B. A concentrated sucrose solution
- C. A dilute sucrose solution
- D. Cytoplasm of a cell
2. Which process requires ATP?
- A. Osmosis
- B. Simple diffusion
- C. Facilitated diffusion
- D. Active transport
3. A potato cylinder gains mass in a sucrose solution. What does this show?
- A. The solution has a lower water potential than the tissue
- B. Sucrose has entered the cells
- C. The solution has a higher water potential than the tissue
- D. The tissue has stopped respiring
4. What is the difference between a channel protein and a carrier protein?
- A. Channels use ATP, carriers do not
- B. A channel forms a pore; a carrier changes shape
- C. Carriers are only in the nucleus
- D. There is no difference
5. Which process releases enzymes such as amylase from a cell?
- A. Endocytosis
- B. Osmosis
- C. Active transport through carriers
- D. Exocytosis