Exam 9: Cellular Respiration and Fermentation

A person on a strict diet and exercise regimen lost 7 kg (about 15 pounds) of body fat in just two weeks. What is the most likely way that the lost fat left the body?

Substrate-level phosphorylation accounts for approximately what percentage of the ATP formed by the reactions of glycolysis?

Most CO₂ from catabolism is released during

The oxygen consumed during cellular respiration is directly involved in which of the following processes or events?

When a molecule of NAD⁺ (nicotinamide adenine dinucleotide) gains a hydrogen atom (not a proton), the molecule becomes ________.

In the absence of oxygen, yeast cells can obtain energy by fermentation, which results in the production of which of the following sets of molecules?

In glycolysis, for each molecule of glucose oxidized to pyruvate, ________.

In mitochondria, exergonic redox reactions

Which electron carrier(s) function in the citric acid cycle?

Which of the following processes is driven by chemiosmosis?

What is the oxidizing agent in the following reaction? Pyruvate + NADH + H⁻ Lactate + NAD⁻

Approximately how many molecules of ATP are produced from the complete oxidation of one molecule of glucose (C₆H₁₂O₆) in aerobic cellular respiration?

The final electron acceptor of the electron transport chain that functions in aerobic oxidative phosphorylation is

Which of the following statements best describes the primary role played by oxygen in cellular respiration?

If glucose is the sole energy source, what fraction of the carbon dioxide exhaled by animals is generated only by the reactions involved in oxidation of pyruvate to acetyl CoA?

In the presence of oxygen, the three-carbon compound pyruvate can be catabolized in the citric acid cycle. First, however, the pyruvate (1) loses a carbon, which is given off as a molecule of CO₂, (2) is oxidized to form a two-carbon compound called acetate, and (3) is bonded to coenzyme A. Which of the following sets of products result from these reactions?

Use the following information to answer the question below. The citric acid cycle. If pyruvate oxidation is blocked, what will happen to the levels of oxaloacetate and citric acid in the citric acid cycle shown in the accompanying figure?

Which of the following processes generates a proton-motive force in mitochondria?

Which of the summary statements below describes the results of the following reaction? C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O + Energy

Starting with one molecule of glucose, glycolysis results in the net production of which of the following sets of energy-containing products?