Question

question 4 of 10
which sentence best describes how most atp is produced during cellular respiration?
a. twice as much atp is made during glycolysis than is used to split glucose.
b. atp synthase uses kinetic energy to join adp molecules with phosphate groups.
c. glycolysis uses atp to split one glucose molecule into two pyruvate molecules.
d. the electron transport chain causes hydrogen ions to move into the intermembrane space.

Explanation:

During cellular respiration, the majority of ATP is produced through oxidative phosphorylation. ATP synthase is a key enzyme in this process. It uses the kinetic energy from the flow of hydrogen - ions (protons) down their concentration gradient to join ADP molecules with phosphate groups to form ATP. Option A only refers to glycolysis which produces a small amount of ATP compared to the electron - transport chain and chemiosmosis. Option C describes a part of glycolysis that consumes ATP. Option D only describes a step in the electron - transport chain that sets up the proton gradient but not the actual ATP production step.

Answer:

B. ATP synthase uses kinetic energy to join ADP molecules with phosphate groups.