Final answer:
Chemiosmotic ATP synthesis does not occur in the cytosol of the cell. It takes place in the mitochondria or plasma membrane, generating 90 percent of the ATP during glucose catabolism.
Step-by-step explanation:
Chemiosmotic ATP synthesis does not occur in the cytosol of the cell. It actually takes place in the mitochondria of eukaryotic cells or in the plasma membrane of prokaryotic cells. This process, known as oxidative phosphorylation, is responsible for generating 90 percent of the ATP produced during glucose catabolism.
In oxidative phosphorylation, a proton gradient is established across the mitochondrial inner membrane or the plasma membrane of prokaryotic cells. This gradient is generated by the electron transport chain, a series of protein complexes embedded in the membrane. The flow of protons down their electrochemical gradient through ATP synthase, a membrane-bound enzyme complex, drives the synthesis of ATP.
Overall, chemiosmotic ATP synthesis in the mitochondria or plasma membrane is an essential process for cellular energy production and is not limited to the cytosol of the cell.