A group of cells was treated with a proteolytic (protein-digesting) enzyme. Which of the following processes would be least affected by this treatment?

A. Diffusion of Na+ through membrane channels
B. Diffusion of lipid-soluble molecules through the plasma membrane
C. Use of carrier molecules in facilitated diffusion
D. Secondary active transport
E. Sodium-potassium exchange pump


Answer: B

Anatomy & Physiology

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