On the Plasma Membrane of the Archaeon Halobacterium Salinarum, Bacteriorhodopsin

question 19

Multiple Choice

On the plasma membrane of the archaeon Halobacterium salinarum, bacteriorhodopsin is found in high density in patches of purple membrane. This protein …

• A) is a light-gated anion channel.
• B) is a single-pass transmembrane protein.
• C) uses the energy stored in the proton gradient to transport small molecules.
• D) changes conformation in response to light.
• E) All of the above.

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