Q: Which of the following best describes the overall equation for aerobic cellular respiration, as shown in the study materials?

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

Question 1

Which of the following best describes the overall equation for aerobic cellular respiration, as shown in the study materials?

Accepted Answer

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

Question 2

During which stage of cellular respiration is the majority of ATP produced?

Accepted Answer

Oxidative phosphorylation

Question 3

Which molecule acts as the final electron acceptor in the electron transport chain during aerobic respiration?

Accepted Answer

$$	ext{O}_2$$

Question 4

What is the main purpose of NAD+ in cellular respiration?

Accepted Answer

To function as an oxidizing agent, accepting electrons during redox reactions

Question 5

Which process occurs in the cytoplasm and does not require oxygen?

Accepted Answer

Glycolysis

Question 6

In the absence of oxygen, which process allows glycolysis to continue by regenerating NAD+?

Accepted Answer

Fermentation

Question 7

Which of the following is a product of lactic acid fermentation?

Accepted Answer

Lactate

Question 8

What is the net gain of ATP molecules produced directly by glycolysis from one molecule of glucose?

Accepted Answer

2 ATP

Question 9

Which of the following best describes a redox reaction?

Accepted Answer

A reaction involving the transfer of electrons from one molecule to another

Question 10

Why does the oxidation of fats yield more ATP than the oxidation of carbohydrates?

Accepted Answer

Fats are broken down into more acetyl CoA units, which enter the citric acid cycle

Question 11

Which of the following statements about substrate-level phosphorylation is correct?

Accepted Answer

It involves the direct transfer of a phosphate group to ADP from a substrate

Question 12

A patient’s muscle cells are deprived of oxygen during intense exercise. Which process allows the cells to continue producing ATP?

Accepted Answer

Lactic acid fermentation

Question 13

Which of the following is NOT a product of the citric acid cycle (per turn)?

Accepted Answer

Pyruvate

Question 14

What is the main role of the electron transport chain in mitochondria?

Accepted Answer

To create a proton gradient that drives ATP synthesis

Question 15

Which of the following best explains why oxygen is essential for aerobic cellular respiration?

Accepted Answer

Oxygen acts as the final electron acceptor in the electron transport chain, allowing the chain to continue

Question 16

If a toxin blocks the function of ATP synthase, what would be the immediate effect on the cell?

Accepted Answer

Protons would not flow back into the mitochondrial matrix, and ATP production would decrease

Question 17

Which of the following is a correct sequence of events for the complete oxidation of glucose in cellular respiration?

Accepted Answer

Glycolysis → Pyruvate oxidation → Citric acid cycle → Oxidative phosphorylation

Question 18

Which of the following statements about fermentation is true?

Accepted Answer

Fermentation allows glycolysis to continue by regenerating NAD+

Question 19

A person is fasting and their body begins to break down stored fats for energy. Which process is responsible for converting fatty acids into molecules that can enter the citric acid cycle?

Accepted Answer

Beta oxidation

Question 20

Which of the following best describes the fate of the carbon atoms from glucose during aerobic respiration?

Accepted Answer

They are released as carbon dioxide

Cellular Respiration: Mechanisms and Pathways

Guida di studio - Domande di pratica

Study guide - Flashcard