A bacterium that catabolizes a compound by linking ion pumps to establish a proton or sodium motive force for energy
A) can circumvent substrate-level and oxidative phosphorylation.
B) makes insufficient energy to grow but enough for cellular maintenance to survive.
C) requires a second bacterium to cooperatively drive the gradient.
D) still requires another carbon substrate to provide a carbon source.

Question

Quizplus · Accepted Answer

The linking of ion pumps to establish a proton or sodium motive force creates a gradient that can be used to make ATP through chemiosmosis. This process is a form of oxidative phosphorylation, but it doesn't require an electron transport chain as is the case in aerobic or anaerobic respiration. Thus, this bacterium can still generate significant energy without going through substrate-level phosphorylation or oxidative phosphorylation.

A Bacterium That Catabolizes a Compound by Linking Ion Pumps