Question

Which one of the following statements is FALSE regarding action of the Fo portion of ATP synthase?

a. The c subunits are organized into a ring-shaped complex.
b. The γγ subunit rotates at up to 100 revolutions per second.
c. The movement of electrons through the membrane drives the rotation of the ring of c subunits.
d. Subunits of the c ring move successively past a stationary a subunit.
e. Rotation of the c ring of F0 leads to the synthesis and release of ATP by catalytic subunits of the F1 portion of the enzyme.

Answer 1

The FALSE statement is that rotation of the c ring of Fo leads to ATP synthesis and release by the catalytic subunits of the F1 portion of ATP synthase.

Step-by-step explanation:

The FALSE statement regarding the action of the Fo portion of ATP synthase is option e: Rotation of the c ring of F0 leads to the synthesis and release of ATP by catalytic subunits of the F1 portion of the enzyme. While it is true that rotation of the c ring of Fo generates the energy required for ATP synthesis, this rotation is not directly responsible for the synthesis and release of ATP by the catalytic subunits of the F1 portion. Instead, the rotation of the c ring is coupled with the conformational changes in the F1 subunits, which ultimately lead to ATP synthesis.