1. What is the summary equation of cellular respiration?

A. 6C0₂ + 6H₂O + Light energy → C₆H₁₂O₆ + 60₂B. C₆H₁₂O₆ + 0₂ → 6C0₂ + 2H₂O + Light EnergyC. C₆H₁₂O₆ + 60₂ → 6C0₂ + 6H₂O + Energy (ATP + heat)D. 6C0₂ + 6H₂O → C₆H₁₂O₆ + 60₂ + Energy (ATP + heat)E. C₆H₁₂O₆ + 30₂ → C0₂ + 3H₂O + Energy (ATP + heat)

2. What is the net energy yield for glycolysis per glucose molecule?

A. 4 ATP + 4 NADH

B. 2 ATP + 2 NADH

C. 2 ATP + 3 NADH

D. 3 ATP + 2 NADH

E. ATP + NADH

3. Which letter in the diagram represent the Krebs Cycle?

A. A

B. B

C. C

D. None of them

4. What is the overall function of the process of cellular respiration?

A. Making energy for the body to use

B. Converting glucose into ATP for use in cellular activities

C. To recycle ATP

D. To make “food” for the cell

E. Ridding the cell of toxic waste products

5. In cellular respiration ___ is consumed while ___ is produced as a

waste product.• CO₂ … O₂• H₂O … CO₂• O₂ … ATP• C₆H₁₂O₆ … CO₂• None of the above are correct

6. Which of the following is true concerning the shuttling of electrons

to different molecules in redox reactions?

• FADH2 is always oxidized first.

• Electrons are carried by NADH+.• NADH can pick up electrons.• ATP synthase removes H₂.• Electrons are added to NAD+. Then NAD+

carries the electrons to another electron acceptor.

7. Name and explain the purpose of the function of the diagram below.

• Glycolysis; to make pyruvate for Krebs cycle

• Cellular respiration; to turn glucose into ATP for cellular use

• Alcohol fermentation; to convert pyruvate into ethanol to regenerate supply of NAD+

• Lactic acid fermentation; to make pyruvate for Krebs cycle

• Lactic acid fermentation; to convert pyruvate to lactase to regenerate supply of NAD+

8. The key difference between cellular respiration and fermentation is ___

A. cellular respiration makes ATP while fermentation uses ATP.

B. fermentation requires O₂ while cellular respiration does not.

C. fermentation is a catabolic pathway while cellular respiration is not.

D. cellular respiration breaks down sugars while fermentation does not

E. cellular respiration requires O₂ to break down sugars while fermentation does not.

9. Glucose is completely broken down in glycolysis and the Krebs cycle, but these two

processes make little ATP. Where is the rest of the energy that cells obtain from glucose?

• in FAD and NAD+

• lost as heat• in the CO₂ molecules released by the

processes• in the oxygen used in the electron transport

chain

• in NADH and FADH2

10. The net gain of ATP from each glucose molecule that goes through cellular respiration

is about ___.

A. 23 ATP

B. 38 ATP

C. 32 ATP

D. 19 ATP

E. 20 ATP

11. Pyruvate is converted to lactate through the process called ___.

A. lactic acid fermentation

B. ATP synthesis

C. glycolysis

D. chemiosmotic theory

E. alcohol fermentation

12. It is possible to lose ___ to ___ ATP during transport of electrons NADH in

cytosol.

A. 0 … 2

B. 1 … 2

C. 0 … 1

D. 1 … 3

E. 0 … 3

13. In eukaryotes, in what organelle membrane is the electron transport

membrane embedded?

A. Smooth ER

B. Cell membrane

C. Rough ER

D. Golgi apparatus

E. None of the above

14. In what process that occurs in cellular respiration is a net of 2 ATPs

produced?A. Glycolysis

B. Krebs cycle

C. Electron transport chain and oxidative phosphorylation

D. Both A and B

E. Both A and C

15. Most of the ATP gained in cellular respiration comes from ___.

A. glycolysis

B. Krebs cycle

C. fermentation

D. chemiosmosis

E. None of the above

16. Which of the following pathways is found in all organisms?

A. Krebs cycle

B. Cellular respiration

C. Fermentation

D. Glycolysis

E. Electron transport chain

17. ___ is the main hydrogen-atom-carrier molecule in cells.

• Cyclic AMP• ATP

• Pi

• FAD• None of the above

18. ___ are produced as waste, when protein is used as fuel for cellular

respiration.A. Ethanol and CO₂

B. Amino acids

C. Sugar molecules

D. Lactate and CO₂

E. Fatty acids

19. Fill in the labeled part of the diagram.

A. Citrate

B. Glucose

C. ATP

D. Pyruvate

E. Acetaldehyde

20. The overall efficiency of respiration is about _____.

A. 86%

B. 40%

C. 50%

D. 42%

E. 38%

Answers Page

1. C2. B3. B4. B5. D6. E7. C8. E9. E10. B

11. A12. A13. E14. C15. D16. D17. D18. B19. A20. B