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.

Question

Quizplus · Accepted Answer

These bacteriorhodopsins are light-driven proton pumps and, similar to the rhodopsins in our retina, have seven transmembrane helices in their structure.

On the Plasma Membrane of the Archaeon Halobacterium Salinarum, Bacteriorhodopsin