Exam 6: Cellular Respiration

Refer to the above illustration of a mitochondrion. Match the labelled parts of the mitochondrion with the steps of cellular respiration. A labelled part may be used once, more than once, or not at all. -ATP synthesis

Suppose that the pH of the matrix was significantly lower than the inner mitochondrial space. How would the ATP synthase function differently?

Refer to the above illustration of a mitochondrion. Match the labelled parts of the mitochondrion with the steps of cellular respiration. A labelled part may be used once, more than once, or not at all. -pyruvate oxidation

Which of the following molecules is responsible for carrying the acetyl group from pyruvate into the citric acid cycle?

During glycolysis, ATP is produced by oxidative phosphorylation.

What is the proton-motive force used for?

In the process of aerobic metabolism, carbon-containing molecules are broken down. What is the energy from the electrons used for?

Glycolysis can take place in the absence of which of the following small molecules?

For every glucose molecule that goes through cellular respiration, how many times is a carbon molecule fully oxidized to CO₂ in the citric acid cycle?

What are the functions of cytochrome c and ubiquinone?

Refer to the above illustration of a mitochondrion. Match the labelled parts of the mitochondrion with the steps of cellular respiration. A labelled part may be used once, more than once, or not at all. -oxidative phosphorylation

What is the final product of glycolysis?

Which of the following directly powers the ATP synthase?

Which of the following processes actually produces a significant quantity of ATP?

Which molecules are responsible for delivering the high-energy electrons from the citric acid cycle to the electron transfer system?

What is the fate of CoA after it delivers an acetyl group into the citric acid cycle?

If, during a chemical reaction, a molecule loses hydrogens, it could be described as being oxidized.

Molecular oxygen is breathed in and expired as carbon dioxide.

What is the final product of glycolysis?

The electrons that are present in NADH and FADH₂ are very high energy and theoretically sufficient to produce ATP alone. Why then have biological systems evolved a way that uses the various steps of cellular respiration to produce ATP?