Question

Which process of cellular respiration generates the most ATP when glucose is completely oxidized to carbon dioxide and water?.

Answer 1

Answer:

The correct answer would be C. Electron transport and chemiosmosis

Electron transport chain (ETC) refers to the series of electron carriers present in the internal membrane of the mitochondria. The electrons from NADH and FADH₂ are carried through the ETC and are finally accepted by water.

Some of the energy of these high energy electrons is used to pump protons into inter-membrane space. It leads to the formation of a proton gradient across the inner membrane.

This gradient is used by the enzyme ATP synthase to phosphorylate ADP into ATP which is termed as chemiosmosis.

ETC and chemiosmosis produced most of the ATP during cellular respiration.

Glycolysis only produces two ATP and two NADH. Krebs cycle produces 6 NADH and 2 FADH₂ from one glucose molecule.

These molecules of  NADH and FADH₂ undergo ETC and chemiosmosis to produce ATP.

Answer 2

Maximum number of ATP re produced during the electron transport chain and chemoosmosis. During glycolysis and krebs cycle, 4 ATP are produced in total. During the ETC of oxidatie phosphorylation, 4 ATPs are produced.