Q: Which equation correctly represents the overall process of aerobic cellular respiration?

$$\text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2 \rightarrow 6\text{CO}_2 + 6\text{H}_2\text{O} + \text{ATP}$$

Q: Which equation represents the conversion of pyruvate to acetyl CoA?

$$\text{Pyruvate} + \text{CoA} + \text{NAD}^+ \rightarrow \text{Acetyl CoA} + \text{CO}_2 + \text{NADH}$$

Question 1

Which molecule acts as the primary electron carrier during glycolysis, accepting electrons from glucose?

Accepted Answer

NAD+

Question 2

During aerobic cellular respiration, what is the final electron acceptor in the electron transport chain?

Accepted Answer

O2

Question 3

Which of the following best describes the process of substrate-level phosphorylation?

Accepted Answer

ATP is produced directly from ADP and inorganic phosphate by enzymes during glycolysis and the Krebs cycle.

Question 4

A patient with a mitochondrial disorder is unable to efficiently carry out oxidative phosphorylation. Which step of cellular respiration would be most directly affected?

Accepted Answer

Electron transport chain and chemiosmosis

Question 5

Which equation correctly represents the overall process of aerobic cellular respiration?

Accepted Answer

$$	ext{C}_6	ext{H}_{12}	ext{O}_6 + 6	ext{O}_2 ightarrow 6	ext{CO}_2 + 6	ext{H}_2	ext{O} + 	ext{ATP}$$

Question 6

Which of the following nutrients can enter cellular respiration at different points, leading to ATP production?

Accepted Answer

Glucose, amino acids, and fatty acids

Question 7

In anaerobic respiration, which molecule can serve as the final electron acceptor instead of oxygen?

Accepted Answer

Nitrate ($$	ext{NO}_3^-)$$

Question 8

During glycolysis, glucose is converted into which molecule before entering the Krebs cycle?

Accepted Answer

Pyruvate

Question 9

Which process occurs in the cytosol and produces a small amount of ATP without requiring oxygen?

Accepted Answer

Glycolysis

Question 10

A brewer’s yeast cell is placed in an anaerobic environment. Which pathway will it use to generate ATP?

Accepted Answer

Fermentation

Question 11

Which of the following is a product of the Krebs cycle?

Accepted Answer

CO2

Question 12

What is the main purpose of NADH and FADH2 in cellular respiration?

Accepted Answer

To carry electrons to the electron transport chain

Question 13

Which step of cellular respiration produces the most ATP?

Accepted Answer

Electron transport chain and chemiosmosis

Question 14

If a cell is deprived of oxygen, which process will be inhibited first?

Accepted Answer

Electron transport chain

Question 15

Which of the following best explains why prokaryotes in waterlogged soil use anaerobic respiration?

Accepted Answer

Oxygen is not available as the final electron acceptor

Question 16

Which equation represents the conversion of pyruvate to acetyl CoA?

Accepted Answer

$$	ext{Pyruvate} + 	ext{CoA} + 	ext{NAD}^+ ightarrow 	ext{Acetyl CoA} + 	ext{CO}_2 + 	ext{NADH}$$

Question 17

Which of the following is NOT a product of fermentation?

Accepted Answer

O2

Question 18

A person is fasting and their body begins to break down fatty acids for energy. At which point do fatty acids enter cellular respiration?

Accepted Answer

Acetyl CoA formation

Question 19

Which of the following statements about the electron transport chain is correct?

Accepted Answer

It uses NADH and FADH2 to generate ATP

Question 20

Which process is responsible for the production of water ($$	ext{H}_2	ext{O}) $$during cellular respiration?

Accepted Answer

Electron transport chain and chemiosmosis

Cellular Respiration: Mechanisms and Pathways

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