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

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

Question 1

Which of the following best represents the overall equation for cellular respiration?

Accepted Answer

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

Question 2

Where does the Krebs Cycle (Citric Acid Cycle) occur within a eukaryotic cell?

Accepted Answer

Mitochondrial matrix

Question 3

Which stage of cellular respiration produces the most ATP?

Accepted Answer

Electron Transport Chain

Question 4

During glycolysis, what are the main products generated from one molecule of glucose?

Accepted Answer

2 ATP, 2 NADH, and 2 pyruvate

Question 5

What is the role of oxygen in the electron transport chain?

Accepted Answer

It is the final electron acceptor, forming water

Question 6

Which of the following statements about anaerobic respiration is correct?

Accepted Answer

It does not require oxygen and produces 2 ATP

Question 7

A muscle cell is working hard during intense exercise and oxygen is scarce. Which process will the cell use to generate ATP, and what byproduct will accumulate?

Accepted Answer

Lactic acid fermentation; lactic acid

Question 8

Which molecule is the main energy currency of the cell?

Accepted Answer

ATP

Question 9

If a toxin blocks the function of NADH, which stage of cellular respiration would be most directly affected?

Accepted Answer

Electron Transport Chain

Question 10

Which of the following best describes the mitochondria’s role in cellular respiration?

Accepted Answer

It is the powerhouse of the cell, hosting the Krebs cycle and ETC

Question 11

A yeast cell is placed in an anaerobic environment. Which process will it use to generate ATP, and what is a likely byproduct?

Accepted Answer

Alcoholic fermentation; ethanol

Question 12

Which of the following is NOT a product of the Krebs cycle?

Accepted Answer

Glucose

Question 13

If the inner mitochondrial membrane is damaged, which process would be most directly impaired?

Accepted Answer

Electron Transport Chain

Question 14

Which of the following best explains why aerobic respiration produces more ATP than anaerobic respiration?

Accepted Answer

Aerobic respiration uses glucose more efficiently by fully oxidizing it

Question 15

Which stage of cellular respiration occurs in the cytoplasm?

Accepted Answer

Glycolysis

Question 16

A patient has a genetic defect that prevents their cells from using oxygen efficiently. Which stage of cellular respiration would be most affected?

Accepted Answer

Electron Transport Chain

Question 17

Which of the following is a correct comparison between lactic acid fermentation and alcoholic fermentation?

Accepted Answer

Both produce 2 ATP per glucose molecule

Question 18

Which molecule donates electrons to the electron transport chain?

Accepted Answer

NADH

Question 19

If a cell is deprived of glucose, which process will be directly affected first?

Accepted Answer

Glycolysis

Question 20

Which of the following is a direct result of the electron transport chain?

Accepted Answer

Formation of water

Cellular Respiration: Mechanisms and Types

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