Which of the Following Is True of Microbes and Their

question 14

Multiple Choice

Which of the following is true of microbes and their membranes?

• A) They are relatively permeable to protons.
• B) Protons can leak through directly when the difference in intracellular and extracellular pH is very high.
• C) Membrane-permeant organic acids can prevent the leakage of protons.
• D) They are able to change the pH optima of their enzymes.
• E) Acidophiles use Na+/H+ antiporters to remove internal protons.

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