In E.coli,which action powers the rotation of the flagella?
A)the hydrolysis of GTP by the flagella
B)phosphorylation of the motB protein by phosphoenolpyruvate
C)the hydrolysis of ATP by the motB protein
D)a proton gradient across the plasma membrane of the bacterium

Question

Quizplus · Accepted Answer

The rotation of the flagella in E.coli is powered by a proton gradient across the plasma membrane of the bacterium. As protons flow down their electrochemical gradient, they bind to the mot proteins in the flagella, causing them to rotate and propel the bacterium forward. This process is known as the proton-motive force. The hydrolysis of GTP, phosphorylation of the motB protein by phosphoenolpyruvate, and the hydrolysis of ATP by the motB protein are not involved in powering the rotation of the flagella in E.coli.

In EColi,which Action Powers the Rotation of the Flagella