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Where in the cell is the enzyme that produces the most ATP during cellular respiration?

Question

Where in the cell is the enzyme that produces the most ATP during cellular respiration?

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Solution

The enzyme that produces the most ATP during cellular respiration is located in the mitochondria of the cell. This process is known as oxidative phosphorylation. Here are the steps:

  1. Glycolysis: This is the first step of cellular respiration and it occurs in the cytoplasm. It breaks down one molecule of glucose into two molecules of pyruvate, producing a small amount of ATP.

  2. Pyruvate Decarboxylation: This step occurs in the mitochondria. Each pyruvate is converted into Acetyl CoA, which is used in the next step.

  3. Citric Acid Cycle (Krebs Cycle): This also occurs in the mitochondria. The Acetyl CoA is further broken down and this process produces some ATP, as well as NADH and FADH2.

  4. Oxidative Phosphorylation: This is the final step and it occurs in the inner mitochondrial membrane. The NADH and FADH2 produced in the previous steps are used here to produce the majority of the cell's ATP. The enzyme involved in this process is called ATP synthase.

So, the enzyme that produces the most ATP during cellular respiration, ATP synthase, is located in the inner mitochondrial membrane.

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