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

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy}$$

Question 1

Which of the following best describes the main purpose of cellular respiration in eukaryotic cells?

Accepted Answer

To break down glucose and other organic molecules to produce ATP for cellular work

Question 2

During aerobic cellular respiration, which molecule acts as the final electron acceptor in the electron transport chain?

Accepted Answer

Oxygen ($$O_2)$$

Question 3

Which of the following equations correctly represents the overall process of aerobic cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{energy}$$

Question 4

Which stage of cellular respiration produces the most ATP molecules per glucose molecule oxidized?

Accepted Answer

Electron Transport Chain and Oxidative Phosphorylation

Question 5

A patient is diagnosed with a mitochondrial disorder that impairs the electron transport chain. Which of the following would most likely be observed in this patient’s cells?

Accepted Answer

Increased production of lactic acid due to reliance on fermentation

Question 6

Which of the following statements about glycolysis is TRUE?

Accepted Answer

Glycolysis splits one glucose molecule into two pyruvate molecules

Question 7

In the process of cellular respiration, what is the main role of NAD+?

Accepted Answer

To transfer electrons from glucose to the electron transport chain

Question 8

Which of the following best explains why energy is harvested in multiple steps during cellular respiration rather than all at once?

Accepted Answer

To prevent the loss of energy as heat and allow for more efficient ATP production

Question 9

During the oxidation of glucose in cellular respiration, which molecule is reduced?

Accepted Answer

Oxygen ($$O_2)$$

Question 10

Which of the following is a correct description of substrate-level phosphorylation?

Accepted Answer

ATP is produced directly by transferring a phosphate group from a substrate to ADP

Question 11

A poison that blocks the function of ATP synthase would directly affect which process?

Accepted Answer

Oxidative phosphorylation

Question 12

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

Accepted Answer

Glucose

Question 13

If a cell is deprived of oxygen, which of the following processes will stop first?

Accepted Answer

Electron transport chain

Question 14

Which of the following best describes the fate of pyruvate in the presence of oxygen?

Accepted Answer

It is oxidized to acetyl CoA and enters the citric acid cycle

Question 15

In a scenario where a person is sprinting and their muscles become oxygen-deprived, which process allows their muscles to continue producing ATP?

Accepted Answer

Lactic acid fermentation

Question 16

Which of the following statements about redox reactions in cellular respiration is correct?

Accepted Answer

Glucose is oxidized and oxygen is reduced

Question 17

How many net ATP molecules are produced per glucose molecule during glycolysis?

Accepted Answer

2

Question 18

Which of the following best explains why cyanide is a deadly poison?

Accepted Answer

It blocks the transfer of electrons to oxygen in the electron transport chain, halting ATP production

Question 19

Which of the following is a real-life example of the importance of stepwise energy harvesting in metabolism?

Accepted Answer

The controlled release of energy in cellular respiration prevents cells from overheating and allows efficient ATP synthesis

Cellular Respiration: Mechanisms and Stages in General Biology

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