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

Question 1

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

Accepted Answer

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

Question 2

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

Accepted Answer

$$2$$

Question 3

Which enzyme type is responsible for transferring a phosphate group to a substrate during glycolysis?

Accepted Answer

Kinase

Question 4

In the energy investment phase of glycolysis, how many ATP molecules are consumed per glucose molecule?

Accepted Answer

$$2$$

Question 5

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

Accepted Answer

O$$_2$$

Question 6

What is the total number of NADH molecules produced from one glucose molecule after glycolysis, pyruvate oxidation, and the citric acid cycle?

Accepted Answer

$$10$$

Question 7

Which process occurs in the mitochondrial matrix in eukaryotic cells?

Accepted Answer

Pyruvate oxidation

Question 8

If a mutation disables the pyruvate dehydrogenase complex, which product would be directly affected?

Accepted Answer

Acetyl-CoA

Question 9

Which of the following statements about glycolysis is TRUE?

Accepted Answer

It produces pyruvate, ATP, and NADH.

Question 10

During the citric acid cycle, how many CO$$_2$$ molecules are released per glucose molecule?

Accepted Answer

$$4$$

Question 11

Which step in cellular respiration is responsible for the majority of ATP production?

Accepted Answer

Electron transport chain and oxidative phosphorylation

Question 12

What is the role of NAD$$^+ in $$cellular respiration?

Accepted Answer

It carries electrons from one reaction to another.

Question 13

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

Accepted Answer

Pyruvate

Question 14

A patient is diagnosed with a mitochondrial disorder that impairs the electron transport chain. Which symptom would most likely result?

Accepted Answer

Reduced ATP synthesis

Question 15

Which process directly generates the most NADH per glucose molecule?

Accepted Answer

Citric acid cycle

Question 16

If oxygen is not available, which process will NOT occur in eukaryotic cells?

Accepted Answer

Electron transport chain

Question 17

Which of the following best explains why glycolysis is considered an ancient metabolic pathway?

Accepted Answer

It occurs in the cytosol and is found in nearly all organisms.

Question 18

During glycolysis, which molecule is oxidized and which is reduced?

Accepted Answer

Glucose is oxidized; NAD$$^+ is $$reduced.

Question 19

Which of the following is a correct sequence of events in aerobic cellular respiration?

Accepted Answer

Glycolysis $$\rightarrow$$ Pyruvate Oxidation $$\rightarrow$$ Citric Acid Cycle $$\rightarrow$$ Electron Transport Chain

Question 20

A cell is observed to have a high concentration of NADH and low ATP. Which part of cellular respiration is most likely impaired?

Accepted Answer

Electron transport chain

Metabolic Pathways: Respiration and Fermentation (Chapter 9) – Study Notes

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