MCAT Biochemistry Question 114: Answer and Explanation
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Question: 114
9. Which of the following is true of diffusion and osmosis?
- A. Diffusion and osmosis rely on the electrochemical gradient of only the compound of interest.
- B. Diffusion and osmosis rely on the electrochemical gradient of all compounds in a cell.
- C. Diffusion and osmosis will proceed in the same direction if there is only one solute.
- D. Diffusion and osmosis cannot occur simultaneously.
Correct Answer: A
Explanation:
The movement of any solute or water by diffusion or osmosis is dependent only on the concentration gradient of that molecule and on membrane permeability.