D2.3 Water potential Quiz
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5 questions, one answer each
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1. A cell with cytoplasm solute concentration 0.3 mol dm⁻³ is placed in 0.1 mol dm⁻³ solution. The solution is:
- A. hypertonic
- B. isotonic
- C. hypotonic
- D. saturated
2. What happens to an onion cell in a hypertonic solution?
- A. It bursts
- B. It becomes turgid
- C. It is plasmolysed
- D. Nothing happens
3. Why are IV fluids isotonic with blood plasma?
- A. To supply energy
- B. So blood cells neither swell nor shrink
- C. To kill bacteria
- D. To lower blood pressure
4. Mean change in mass +2.0 %, SE 2.5 %. What can be concluded?
- A. The tissue definitely gained water
- B. The solution is definitely hypertonic
- C. The error range includes zero, so the solution may be isotonic
- D. The experiment has no errors
5. Which substance dissolves because its –OH groups hydrogen bond with water?
- A. Olive oil
- B. Glucose
- C. Wax
- D. Nitrogen gas