Q: Which of the following best describes the overall chemical equation for cellular respiration?

$$C_6H_{12}O_6$ + 6 \mathrm{O}_2 \rightarrow 6 \mathrm{CO}_2 + 6 \mathrm{H}_2O + \text{Energy}$$

Question 1

Which of the following best describes the overall chemical equation for cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6 \mathrm{O}_2 ightarrow 6 \mathrm{CO}_2 + 6 \mathrm{H}_2O + 	ext{Energy}$$

Question 2

During glycolysis, what is the net gain of ATP molecules per molecule of glucose?

Accepted Answer

2 ATP

Question 3

Which molecule is regenerated at the end of the citric acid cycle, allowing the cycle to continue?

Accepted Answer

Oxaloacetate

Question 4

Where in the cell does oxidative phosphorylation occur?

Accepted Answer

Inner membrane of mitochondria

Question 5

What is the primary role of oxygen in cellular respiration?

Accepted Answer

To act as the final electron acceptor in the electron transport chain

Question 6

If a cell is deprived of oxygen, which process allows it to continue producing ATP?

Accepted Answer

Fermentation

Question 7

Which of the following is a product of pyruvate oxidation?

Accepted Answer

Acetyl CoA

Question 8

How many NADH molecules are produced from one glucose molecule during glycolysis?

Accepted Answer

2 NADH

Question 9

Which process directly produces the most ATP during cellular respiration?

Accepted Answer

Oxidative phosphorylation

Question 10

In lactic acid fermentation, what is the final electron acceptor?

Accepted Answer

Pyruvate

Question 11

Which of the following statements about ATP is TRUE?

Accepted Answer

ATP is a short-term energy storage molecule

Question 12

Which step in cellular respiration occurs in the cytosol?

Accepted Answer

Glycolysis

Question 13

What is the main purpose of the electron transport chain in cellular respiration?

Accepted Answer

To create a proton gradient for ATP synthesis

Question 14

Which of the following is NOT a direct output of the citric acid cycle?

Accepted Answer

Glucose

Question 15

During chemiosmosis, ATP is produced as a result of:

Accepted Answer

The flow of $$H^+$$ ions down their electrochemical gradient through ATP synthase

Question 16

Which metabolic pathway is shared by both cellular respiration and fermentation?

Accepted Answer

Glycolysis

Question 17

A patient with a mitochondrial disorder is unable to efficiently produce ATP via oxidative phosphorylation. Which process would still allow their cells to generate some ATP?

Accepted Answer

Glycolysis

Question 18

Which of the following best explains why fats yield more ATP per gram than carbohydrates?

Accepted Answer

Fats have more reduced carbon atoms, leading to more electron carriers being produced

Question 19

Which of the following is a catabolic pathway that connects to the citric acid cycle?

Accepted Answer

Fatty acid breakdown

Question 20

If a cell metabolizes one molecule of glucose completely via aerobic respiration, what is the theoretical maximum number of ATP molecules produced?

Accepted Answer

38 ATP

Cellular Respiration: Pathways and Connections

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