Question

Which statement is correct about the Krebs cycle?

The Krebs cycle produces electron carriers for the electron transport chain.
Oxygen is a waste product of the Krebs cycle.
In the Krebs cycle, carbon dioxide is used to make glucose.
Acetyl-CoA combines with pyruvic acid to make glucose in the Krebs cycle.

During the electron transport chain, which process leads to the production of large amounts of ATP?

High-energy electrons pump hydrogen ions against the concentration gradient.
Energy carriers release carbon dioxide that flows through the mitochondrial membrane.
Water is broken down into oxygen and hydrogen ions to produce ATP.
NADH combines with FADH2 to produce large amounts of ATP.