Here's a breakdown:
* Glycolysis: The first stage of cellular respiration, occurs in the cytoplasm, breaks down glucose into pyruvate, producing a small amount of ATP and NADH.
* Krebs Cycle: This occurs in the mitochondria. Pyruvate from glycolysis is converted into acetyl-CoA, which enters the Krebs cycle. Here, a series of reactions produce:
* ATP: One molecule of ATP per cycle.
* NADH: Three molecules of NADH per cycle.
* FADH2: One molecule of FADH2 per cycle.
* CO2: Two molecules of CO2 per cycle.
* Electron Transport Chain: The NADH and FADH2 produced in the Krebs cycle deliver electrons to the electron transport chain, which uses this energy to pump protons across the mitochondrial membrane, creating a proton gradient. This gradient is then used by ATP synthase to generate a large amount of ATP.
In summary:
* Glycolysis: Produces a small amount of ATP and NADH.
* Krebs Cycle: Produces ATP, NADH, FADH2, and CO2.
* Electron Transport Chain: Uses NADH and FADH2 to produce the majority of ATP in cellular respiration.
It's important to note that the process of cellular respiration is highly complex and involves many enzymes and coenzymes. This explanation provides a simplified overview of how ATP, NADH, and CO2 are produced.
