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

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

Question 1

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

Accepted Answer

To break down glucose and other food molecules to release energy for cellular work

Question 2

Which equation correctly represents the overall process of cellular respiration?

Accepted Answer

$$\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6 \mathrm{O}_2 ightarrow 6 \mathrm{CO}_2 + 6 \mathrm{H}_2\mathrm{O} + 	ext{energy}$$

Question 3

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

Accepted Answer

Electron transport chain and chemiosmosis

Question 4

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

Accepted Answer

Increased production of lactic acid in muscle cells

Question 5

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

Accepted Answer

Oxygen ($$\mathrm{O}_2)$$

Question 6

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

Accepted Answer

Fermentation

Question 7

Which of the following is a direct product of glycolysis?

Accepted Answer

Pyruvate

Question 8

A marathon runner experiences muscle fatigue due to lactic acid buildup. Which cellular process is responsible for this phenomenon?

Accepted Answer

Lactic acid fermentation

Question 9

Which of the following statements about ATP is correct?

Accepted Answer

ATP stores energy in the bonds between its phosphate groups

Question 10

Which step in cellular respiration produces $$\mathrm{CO}_2 as a $$waste product?

Accepted Answer

Citric acid cycle (Krebs cycle)

Question 11

A scientist measures the oxygen consumption of a mouse at rest and during exercise. What does increased oxygen consumption during exercise indicate about cellular respiration?

Accepted Answer

The mouse is producing more ATP through aerobic respiration

Question 12

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

Accepted Answer

Fats contain more carbon-hydrogen bonds, which release more electrons for the electron transport chain

Question 13

Which of the following is NOT a stage of cellular respiration?

Accepted Answer

Photosynthesis

Question 14

If a cell produces 2 ATP molecules per glucose during fermentation, how many ATP molecules are produced per glucose during aerobic respiration?

Accepted Answer

About 32

Question 15

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

Accepted Answer

Glycolysis → Citric acid cycle → Electron transport chain

Question 16

A person is fasting and their body begins to break down stored fat for energy. Which process allows fatty acids to enter cellular respiration?

Accepted Answer

Fatty acids are converted to acetyl CoA and enter the citric acid cycle

Question 17

Which of the following is a real-world consequence of cyanide poisoning, which blocks a key enzyme in the electron transport chain?

Accepted Answer

Cells cannot produce sufficient ATP, leading to rapid organ failure

Question 18

Which of the following is true about NADH and FADH$$_2 in $$cellular respiration?

Accepted Answer

They donate electrons to the electron transport chain, helping generate ATP

Question 19

A cell is exposed to a drug that inhibits ATP synthase. What is the most immediate effect on cellular respiration?

Accepted Answer

ATP production via chemiosmosis will decrease dramatically

Question 20

Which of the following best explains why cellular respiration is considered an exergonic process?

Accepted Answer

It releases energy by breaking down glucose into smaller molecules

Cellular Respiration: Obtaining Energy from Food (Chapter 6 Study Notes)

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