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Cellular Respiration   Academy Biology

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

How do organisms get the energy they need?
a.
by burning food molecules and releasing their energy as heat
b.
by breathing oxygen into the lungs and combining it with carbon dioxide
c.
by breaking down food molecules gradually and capturing their chemical energy
d.
by using the sun’s energy to break down food molecules and form chemicals
 

 2. 

Which of the following is NOT a stage of cellular respiration?
a.
fermentation
b.
electron transport
c.
glycolysis
d.
Krebs cycle
 

 3. 

Which of the following is the correct sequence of events in cellular respiration?
a.
glycolysis ® fermentation ® Krebs cycle
b.
Krebs cycle ® electron transport ® glycolysis
c.
glycolysis ® Krebs cycle ® electron transport
d.
Krebs cycle ® glycolysis ® electron transport
 

 4. 

What is the correct equation for cellular respiration?
a.
6O2 + C6H12O6 ® 6CO2 + 6H2O + Energy
b.
6O2 + C6H12O6 + Energy ® 6CO2 + 6H2O
c.
6CO2 + 6H2O ® 6O2 + C6H12O6 + Energy
d.
6CO2 + 6H2O + Energy ® 6O2 + C6H12O6
 

 5. 

Cellular respiration releases energy by breaking down
a.
food molecules.
b.
ATP.
c.
carbon dioxide.
d.
water.
 

 6. 

What are the reactants in the equation for cellular respiration?
a.
oxygen and lactic acid
b.
carbon dioxide and water
c.
glucose and oxygen
d.
water and glucose
 

 7. 

Which of these is a product of cellular respiration?
a.
oxygen
b.
water
c.
glucose
d.
lactic acid
 

 8. 

Cellular respiration is called an aerobic process because it requires
a.
light.
b.
exercise.
c.
oxygen.
d.
glucose.
 

 9. 

Which organism is NOT likely to carry out cellular respiration?
a.
cypress tree
b.
button mushroom
c.
anaerobic bacterium
d.
Siberian tiger
 
 
nar001-1.jpg

Figure 9–1
 

 10. 

Using Figure 9–1, which pairing matches the structures shown in the cell diagrams with the processes that take place within those structures?
a.
A: photosynthesis; B: cellular respiration
b.
C: photosynthesis; D: cellular respiration
c.
D: photosynthesis; E: cellular respiration
d.
E: photosynthesis; D: cellular respiration
 

 11. 

Which process does NOT release energy from glucose?
a.
glycolysis
b.
photosynthesis
c.
fermentation
d.
cellular respiration
 

 12. 

Which of the following is one of the ways that cellular respiration and photosynthesis are opposite processes?
a.
Photosynthesis releases energy, and cellular respiration stores energy.
b.
Photosynthesis removes carbon dioxide from the atmosphere, and cellular respiration puts it back.
c.
Photosynthesis removes oxygen from the atmosphere, and cellular respiration puts it back.
d.
Photosynthesis consumes glucose, and cellular respiration produces glucose.
 

 13. 

Photosynthesis is to chloroplasts as cellular respiration is to
a.
chloroplasts.
b.
cytoplasm.
c.
mitochondria.
d.
nuclei.
 

 14. 

Unlike photosynthesis, cellular respiration occurs in
a.
animal cells only.
b.
plant cells only.
c.
prokaryotic cells only.
d.
all eukaryotic cells.
 

 15. 

Plants cannot release energy from glucose using
a.
glycolysis.
b.
photosynthesis.
c.
the Krebs cycle.
d.
cellular respiration.
 

 16. 

The products of photosynthesis are the
a.
products of cellular respiration.
b.
reactants of cellular respiration.
c.
products of glycolysis.
d.
reactants of fermentation.
 

 17. 

Which of these processes takes place in the cytoplasm of a cell?
a.
glycolysis
b.
electron transport
c.
Krebs cycle
d.
photosynthesis
 

 18. 

Glycolysis provides a cell with a net gain of
a.
2 ATP molecules.
b.
4 ATP molecules.
c.
18 ATP molecules.
d.
36 ATP molecules.
 

 19. 

The starting molecule for glycolysis is
a.
ADP.
b.
pyruvic acid.
c.
citric acid.
d.
glucose.
 

 20. 

Glycolysis requires
a.
ATP.
b.
oxygen.
c.
sunlight.
d.
NADP+.
 

 21. 

Which of the following is NOT a product of glycolysis?
a.
NADH
b.
pyruvic acid
c.
ATP
d.
glucose
 

 22. 

Which of the following is an electron carrier that plays a role in cellular respiration?
a.
NAD+
b.
pyruvic acid
c.
NADP+
d.
ATP
 

 23. 

The starting molecule for the Krebs cycle is
a.
glucose.
b.
NADH.
c.
pyruvic acid.
d.
coenzyme A.
 

 24. 

The Krebs cycle does NOT occur if
a.
oxygen is present.
b.
oxygen is not present.
c.
glycolysis occurs.
d.
carbon dioxide is present.
 

 25. 

The Krebs cycle produces
a.
oxygen.
b.
lactic acid.
c.
carbon dioxide.
d.
glucose.
 

 26. 

In the Krebs cycle, the carbon atoms in a three-carbon molecule are released in
a.
one molecule of water.
b.
three molecules of oxygen.
c.
three molecules of carbon dioxide.
d.
one molecule of glucose.
 

 27. 

In the presence of oxygen, glycolysis is followed by
a.
lactic acid fermentation.
b.
alcoholic fermentation.
c.
photosynthesis.
d.
the Krebs cycle.
 
 
nar002-1.jpg

Figure 9–2
 

 28. 

What process do the arrows for oxygen going in and water coming out represent in the Figure 9–2 diagram of the mitochondria?
a.
electron transport
b.
fermentation
c.
glycolysis
d.
the Krebs cycle
 

 29. 

In eukaryotes, electron transport occurs in the
a.
inner mitochondrial membrane.
b.
nucleus.
c.
cell membrane.
d.
cytoplasm.
 

 30. 

Which of the following pass high-energy electrons to the electron transport chain?
a.
NADH and FADH2
b.
ATP and ADP
c.
citric acid
d.
acetyl–CoA
 

 31. 

High-energy electrons that move down the electron transport chain ultimately provide the energy needed to
a.
transport water molecules across the membrane.
b.
convert ADP molecules into ATP molecules.
c.
convert carbon dioxide into water molecules.
d.
break down glucose into pyruvic acid molecules.
 

 32. 

The energy of the electrons passing along the electron transport chain is directly used to
a.
make lactic acid.
b.
make citric acid.
c.
transport H+ ions.
d.
split water molecules.
 

 33. 

Cellular respiration uses 1 molecule of glucose to produce approximately
a.
2 ATP molecules.
b.
4 ATP molecules.
c.
32 ATP molecules.
d.
36 ATP molecules.
 

 34. 

Lactic acid fermentation occurs in
a.
bread dough.
b.
any environment containing oxygen.
c.
muscle cells.
d.
mitochondria.
 

 35. 

The two main types of fermentation are called
a.
alcoholic and aerobic.
b.
aerobic and anaerobic.
c.
alcoholic and lactic acid.
d.
lactic acid and anaerobic.
 

 36. 

The air bubbles and spongy texture of bread are due to which process?
a.
lactic acid fermentation
b.
glycolysis
c.
alcoholic fermentation
d.
the Krebs cycle
 

 37. 

When microorganisms in milk produce acid under certain conditions, yogurt results. Which of these processes would you expect to be key in the production of yogurt?
a.
the Krebs cycle
b.
photosynthesis
c.
alcoholic fermentation
d.
lactic acid fermentation
 

 38. 

During fermentation,
a.
NAD+ is regenerated, allowing glycolysis to continue.
b.
glucose is split into 3 pyruvic acid molecules.
c.
oxygen is required.
d.
carbon dioxide is produced.
 

 39. 

The conversion of pyruvic acid into lactic acid requires
a.
alcohol.
b.
oxygen.
c.
ATP.
d.
NADH.
 

 40. 

Breathing heavily after running a race is your body’s way of
a.
making more citric acid.
b.
repaying an oxygen debt.
c.
restarting glycolysis.
d.
stopping the electron transport chain.
 

 41. 

When the body needs to exercise for longer than 90 seconds, it generates ATP by carrying out
a.
lactic acid fermentation.
b.
alcoholic fermentation.
c.
cellular respiration.
d.
glycolysis.
 

 42. 

If you want to control your weight, how long should you exercise aerobically each time that you exercise?
a.
at least 90 seconds
b.
less than 15 minutes
c.
15 to 20 minutes
d.
more than 20 minutes
 

 43. 

The energy needed to win a 1-minute footrace is produced mostly by
a.
lactic acid fermentation.
b.
cellular respiration.
c.
using up stores of ATP.
d.
breaking down fats.
 

 44. 

Which statement mainly explains why even well-conditioned athletes have to pace themselves for athletic events that last several hours?
a.
Lactic acid fermentation can cause muscle soreness.
b.
Heavy breathing is needed to get rid of lactic acid.
c.
Cellular respiration releases energy more slowly than fermentation does.
d.
Alcoholic fermentation produces carbon dioxide.
 

 45. 

All of the following are sources of energy for humans during exercise EXCEPT
a.
stored ATP.
b.
alcoholic fermentation.
c.
lactic acid fermentation.
d.
cellular respiration.
 

Modified True/False
Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true.
 

 1. 

A calorie is the amount of energy needed to raise the temperature of 1 gram of water 1 degree Celsius. _________________________

 

 2. 

Animals breathe in order to take in the carbon dioxide their cells need to perform cellular respiration. _________________________

 

 3. 

Either cellular respiration or fermentation can be used to release energy, depending on the presence of carbohydrates. _________________________

 

 4. 

In an oak tree, carbohydrates are produced by the process of photosynthesis, and cellular respiration is used to convert the chemical energy in the carbohydrates to ATP. _________________________

 
 


nar003-1.jpg

Figure 9–3
 

 5. 

All but one of the organisms listed in the food chain in Figure 9–3 carry out cellular respiration.

_________________________

 

 6. 

The net products of glycolysis are 2 ATP, 2 NADH, and 2 pyruvic acid molecules. _________________________

 

 7. 

The Krebs cycle releases energy in the form of ATP. _________________________

 

 8. 

Electron carriers bring electrons from glycolysis and the Krebs cycle to the electron transport chain. _________________________

 

 9. 

In prokaryotes, the electron transport chain is located in the inner membrane of the mitochondria. _________________________

 

 10. 

Without the Krebs cycle, the electron transport chain cannot function. _________________________

 

Science Skills
 
 
A scientist set up a respiration chamber as shown below. She placed a mouse in flask B. Into flasks A, C, and D, she poured distilled water mixed with the acid-base indicator phenolphthalein. In the presence of CO2, phenolphthalein turns from pink to clear. She allowed the mouse to stay in the chamber for about an hour.

nar004-1.jpg

Figure 9–7
 

 1. 

Infer Write the equation for cellular respiration. Based on this equation and the setup shown in Figure 9–7, what substance(s) would you expect the mouse in flask B to give off?
 

 2. 

Interpret Visuals What will the mouse require to carry out cellular respiration? Look at the flasks in Figure 9–7. Describe the flow of materials through the flasks. Will the mouse receive fresh air so that it can survive?
 

 3. 

Interpret Visuals Based on Figure 9–7, how will the scientist be able to detect whether the mouse is carrying out cellular respiration?
 

 4. 

Apply Concepts Assume that the scientist set up an identical respiration chamber, except that in this setup she placed a cricket in flask B instead of a mouse. At the end of one hour, she measured the amount of CO2 given off by the cricket and the mouse. A small amount of CO2 had been given off by the mouse, but little to no CO2 had been given off by the cricket. Was the cricket carrying out cellular respiration? Explain these results.
 

 5. 

Predict Assume that the scientist set up an identical respiration chamber, except that in this setup she placed a mouse that had been exercising on a hamster wheel. Then, the scientist measured the amount of CO2 given off by both mice at the end of 15 minutes. Predict which setup produced the most CO2. Explain your answer.
 
 
A student poured a solution of bromthymol blue indicator into three test tubes. Then, he placed an aquatic plant in two of the test tubes, as shown below. He placed a stopper on each test tube and placed them all in the dark for 24 hours. Bromthymol blue turns from blue to yellow in the presence of CO2.

nar005-1.jpg

Figure 9–9
 

 6. 

Apply Concepts Look at Figure 9–9. Which process or processes would you expect the organisms in the test tubes to carry out—cellular respiration, photosynthesis, or both? When would you expect each process to occur?
 

 7. 

Infer What is the purpose of the bromthymol blue in Figure 9–9? How can the student use this indicator to draw conclusions about the processes that the aquatic plants are carrying out? Explain your answer.
 

 8. 

Predict Predict what will happen to the test tubes in Figure 9–9 after 24 hours in the dark.
 

 9. 

Predict Assume that after 24 hours in the dark, the bromthymol blue in test tubes 2 and 3 in Figure 9–9 had turned yellow. The student then placed test tube 3 in a sunny window. He left test tube 2 in the dark. Predict what color the solution in each test tube will be after the next 24 hours.
 

 10. 

Apply Concepts Explain your prediction in question 14 in terms of cellular respiration and/or photosynthesis.
 



 
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