Why does electron transport chain happen?

Answer 1

The ETC and the coupled reaction of chemiosmosis produces the most ATPs in respiration (~34). Glycolysis and the Krebs Cycle only account for ~4 ATPs. The two processes of the ETC and chemiosmosis, called oxidative phosphorylation is more effective than substrate-level phosphorylation.

Answer 2

to transfer 2 electrons and 2 hydrogen molecules to meet up oxygen from respiration to produce energy, 3ATP molecules, and water

Answer 3

The Kreb's Citric Acid Cycle produces all of the Energy required for Metabolism.