Glycolysis is the first stage of cellular respiration, where glucose is broken down into pyruvate.

During glycolysis, 2 molecules of ATP are produced and 2 molecules of ATP are consumed, resulting in a net gain of 2 ATP molecules.

Pyruvate is one of the products of glycolysis, along with NADH and ATP.

Pyruvate dehydrogenase is an enzyme that converts pyruvate to acetyl CoA, which then enters the Krebs Cycle.

During the Krebs Cycle, 2 molecules of ATP are produced per molecule of acetyl CoA.

NADH is one of the products of the Krebs Cycle, along with FADH2, ATP, and carbon dioxide.

The electron transport chain is responsible for generating ATP through oxidative phosphorylation, using the energy released from the transfer of electrons.

During oxidative phosphorylation, approximately 32 molecules of ATP are produced per molecule of glucose.

Oxygen is the final electron acceptor in the electron transport chain, and its reduction to water is coupled with the generation of ATP.

The complete oxidation of one molecule of glucose through cellular respiration yields approximately 38 molecules of ATP.

Phosphofructokinase is a key regulatory enzyme in glycolysis, controlling the rate of glucose breakdown.

NADH and FADH2 are electron carriers that transfer electrons through the electron transport chain.

NADH is a product of the Krebs Cycle that enters the electron transport chain, along with FADH2.

ATP synthase is an enzyme that generates ATP through oxidative phosphorylation, using the energy released from the flow of protons across a membrane.

Citrate synthase is a key regulatory enzyme in the Krebs Cycle, controlling the rate of acetyl CoA entry into the cycle.