Osmosis and active transport Quiz
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5 questions, one answer each
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1. In osmosis, what moves across the partially permeable membrane?
- A. Sugar
- B. Water
- C. Oxygen
- D. Salt ions
2. A plant cell is placed in a very concentrated salt solution. What happens?
- A. It becomes turgid
- B. It bursts
- C. It takes in more water
- D. It loses water and becomes flaccid
3. A potato cylinder gains 0.5 g in a solution. What does this show?
- A. Water entered the potato by osmosis
- B. Sugar left the potato
- C. The solution was more concentrated than the potato
- D. Active transport occurred
4. What is the main difference between active transport and diffusion?
- A. Diffusion needs energy
- B. Active transport moves substances against a concentration gradient using energy
- C. Active transport only moves water
- D. Diffusion only happens in plants
5. Which change would slow the rate of diffusion across a membrane?
- A. Increasing the temperature
- B. Increasing the surface area
- C. Making the membrane thicker
- D. Making the concentration gradient steeper