Cellular Respiration Unit Test
Name: _______________________________________________ Date: _____________
Part I.
1. Write the equation for the BALANCED aerobic cellular respiration reaction in the space
below. Write the chemical formulas AND names of the molecules. Label the reaction as
endergonic or exergonic.
C6H12O6 + 6O6  6CO2 + 6H2O + energy
Glucose
oxygen gas carbon dioxide water
2. Why is cellular respiration essential to life?
Cellular respiration unlocks the chemical energy stored in the chemical bonds of food molecules.
The energy is released from the cellular respiration reaction as ATP, which is a high energy
molecule that is like a battery for the cells. In other words, ATP provides energy ready for the
cells to use. All living things require a constant supply of energy to power their life processes.
3. The drug dinitrophenol makes the inner mitochondrial membrane leaky to hydrogen ions
(H+).
a. In which direction would you expect the H+ to leak, from the intermembrane space to
the matrix or the reverse? Why?
Oxygen (O2) is the final acceptor for hydrogen (H) atoms at the end of the respiratory chain. The
chain can continue to produce ATP only if oxygen is present.
b. What effect would this drug have on ATP production? Why?
Without an adequate H+ gradient, ATP production will be reduced and may stop.
c. Would you recommend this drug for weight loss? Why or why not?
No, the person could die due to the lack of ATP which is necessary to the life of cells.
Part II. Multiple Choice
1. Energy is
a. the ability to break or form chemical bonds
b. the ability to do work
c. the ability to change things
d. the ability to break chemical bonds
7. Food has _______________________________ energy.
a. stored chemical energy
c. stored kinetic energy
b. energy ready for cells to use
d. high energy phosphates
8. Energy READY for the cells to use is most commonly stored in
a. NADP+
c. ADP
b. ATP
9. Energy in food is released through
a. photosynthesis
b. electron transport chain
10. What types of organisms need energy to live?
a. plants
b. autotrophs
e. all of the above
d. glucose
c. cellular respiration
d. Calvin cycle
c. protists
d. heterotrophs
11. True or false. Energy is neither created or destroyed.
a. true
b. false
12. True or false. Matter is neither created or destroyed.
a. true
b. false
Part IV. Cellular Respiration Multiple Choice
17. In cellular respiration the energy starts as ____________ energy and ends up as
______________ energy.
a. light; heat
c. chemical; chemical
b. heat; light
d. light; chemical
18. In the human body, muscle cells have an increased need for energy during exercise. To help
supply this energy, the body will immediately increase —
a. activity in the nervous system to stimulate intake of carbon dioxide
b. the need for waste products to be retained
c. the breathing rate to supply more oxygen to cells for the release of energy
d. food intake to increase the substances available for respiration
19. Which organelle does cellular respiration take place in, in eukaryotic cells?
a. mitochondria
c. lysosome
b. vacuole
d. chloroplast
20. In cellular respiration, what organic molecule is most often broken down for energy?
a. amino acids
c. glucose
b. glycerol
d. fatty acids
21. What does glycolysis mean?
a. forming glucose
b. splitting glucose
c. releasing energy
d. initial step in the formation of glucose
22. What are the products of glycolysis?
a. 2 ATP
b. 36 ATP
c. 2 ATP, 6 NADH, 2 FADH
d. 2 pyruvic acid molecules and 2 ATP molecules
e. ethanol and carbon dioxide
23. What are the products of the electron transport chain in respiration?
a. 2 ATP
b. 36 ATP
c. 2 ATP, 6 NADH, 2 FADH
d. 2 pyruvic acid molecules and 2 ATP molecules
e. ethanol and carbon dioxide
24. What are the products of the Krebs cycle?
a. 2 ATP
b. 36 ATP
c. 2 ATP, 6 NADH, 2 FADH
d. 2 pyruvic acid molecules and 2 ATP molecules
25. What is the final electron acceptor molecule in cellular respiration?
a. NAD+
b. FAD+
c. oxygen gas
d. carbon dioxide
Choose 1 of the following
(1)Explain Cellular Respiration: glycolysis, fermentation, the Krebs Cycle and Electron
Transport Chain as it relates to cells. Use writing and diagrams to develop this essay.
Vocabulary words are listed below.
Cellular respiration, calorie, glycolysis, NAD+, fermentation, anaerobic, NADH, Kreb’s
cycle, aerobic, electron transport chain, FADH2, Pyruvic acid, FADH,
CO2, ATP, cytosol, matrix
(2) What is the link between exercise and cellular respiration? Use evidence from class activities
to support your claims.