Which of the following is NOT a
stage of cellular respiration?
1.
2.
3.
4.
1
fermentation
electron transport
glycolysis
Krebs cycle
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Which of the following is the correct
sequence of events in cellular respiration?
glycolysis  fermentation  Krebs
cycle
Krebs cycle  electron transport 
glycolysis
glycolysis  Krebs cycle  electron
transport
Krebs cycle  glycolysis  electron
transport
1.
2.
3.
4.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Which of the following is released
during cellular respiration?
1.
2.
3.
4.
1
oxygen
air
energy
lactic acid
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Cellular respiration uses one
molecule of glucose to produce
1. 2 ATP molecules.
2. 34 ATP
molecules.
3. 36 ATP
molecules.
4. 38 ATP
molecules.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
What is the correct equation for
cellular respiration?
6O2 + C6 H12 O6 
6CO2 + 6H2 O + Energy
6O2 + C6 H12 O6 +
Energy  6CO2 + 6H2
O
6CO2 + 6H2 O  6O2 +
C6 H12 O6 + Energy
6CO2 + 6H2 O + Energy
 6O2 + C6 H12 O6
1.
2.
3.
4.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Cellular respiration releases
energy by breaking down
1.
2.
3.
4.
1
food molecules.
ATP.
carbon dioxide.
water.
2
3
4
5
25%
1
25%
25%
2
3
25%
4
What are the reactants in the
equation for cellular respiration?
1. oxygen and lactic
acid
2. carbon dioxide
and water
3. glucose and
oxygen
4. water and glucose
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Which of these is a product of
cellular respiration?
1.
2.
3.
4.
1
oxygen
water
glucose
all of the above
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Which of these processes takes
place in the cytoplasm of a cell?
1.
2.
3.
4.
1
glycolysis
electron transport
Krebs cycle
all of the above
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Glycolysis provides a cell with a
net gain of
1. 2 ATP molecules.
2. 4 ATP molecules.
3. 18 ATP
molecules.
4. 36 ATP
molecules.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
The starting molecule for
glycolysis is
1.
2.
3.
4.
1
ADP.
pyruvic acid.
citric acid.
glucose.
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Glycolysis requires
1. an energy input.
2. oxygen.
3. hours to produce
many ATP
molecules.
4. NADP+.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Which of the following is NOT a
product of glycolysis?
1.
2.
3.
4.
1
NADH
pyruvic acid
ATP
glucose
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Which of the following acts as an
electron carrier in cellular respiration?
NAD+
pyruvic acid
ADP
ATP
1.
2.
3.
4.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Lactic acid fermentation occurs
in
1. bread dough.
2. any environment
containing
oxygen.
3. muscle cells.
4. mitochondria.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
The two main types of
fermentation are called
1. alcoholic and
aerobic.
2. aerobic and
anaerobic.
3. alcoholic and lactic
acid.
4. lactic acid and
anaerobic.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
One cause of muscle soreness
is
1. alcoholic
fermentation.
2. glycolysis.
3. lactic acid
fermentation.
4. the Krebs cycle.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Which process is used to
produce beer and wine?
1. lactic acid
fermentation
2. glycolysis
3. alcoholic
fermentation
4. the Krebs cycle
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Milk is converted to yogurt under certain conditions when
the microorganisms in the milk produce acid. Which of
these processes would you expect to be key in the
production of yogurt?
1. the Krebs cycle
2. photosynthesis
3. alcoholic
fermentation
4. lactic acid
fermentation
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
During lactic acid fermentation,
NAD+ is regenerated,
allowing glycolysis to
continue.
glucose is split into
three pyruvic acid
molecules.
oxygen is required.
3 ATP molecules are
produced.
1.
2.
3.
4.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
The conversion of pyruvic acid
into lactic acid requires
1.
2.
3.
4.
1
alcohol.
oxygen.
ATP.
NADH.
2
3
4
5
25%
1
25%
25%
2
3
25%
4
In the presence of oxygen,
glycolysis is followed by
1. lactic acid
fermentation.
2. alcoholic
fermentation.
3. photosynthesis.
4. the Krebs cycle.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Cellular respiration is called an
aerobic process because it requires
1.
2.
3.
4.
1
light.
exercise.
oxygen.
glucose.
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Which organism is NOT likely to
carry out cellular respiration?
1. tree
2. mushroom
3. anaerobic
bacterium
4. tiger
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
The starting molecule for the
Krebs cycle is
1.
2.
3.
4.
1
glucose.
NADH.
pyruvic acid.
coenzyme A.
2
3
4
5
25%
1
25%
25%
2
3
25%
4
The Krebs cycle does not occur
if
1. oxygen is present.
2. fermentation
occurs.
3. glycolysis occurs.
4. carbon dioxide is
present.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
The Krebs cycle produces
1.
2.
3.
4.
1
oxygen.
lactic acid.
electron carriers.
glucose.
2
3
4
5
25%
1
25%
25%
2
3
25%
4
The Krebs cycle starts with
1.
lactic acid and yields
carbon dioxide.
glucose and yields 32
ATPs.
pyruvic acid and yields
lactic acid or alcohol.
pyruvic acid and yields
carbon dioxide.
2.
3.
4.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
The electron transport chain can
be found in
1.
2.
3.
4.
1
prokaryotes.
animals.
plants.
all of the above
2
3
4
5
25%
1
25%
25%
2
3
25%
4
In eukaryotes, electron transport
occurs in the
1.
2.
3.
4.
1
mitochondria.
chloroplasts.
cell membrane.
cytoplasm.
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Which of the following passes high-energy
electrons into the electron transport chain?
1.
2.
3.
4.
1
NADH and FADH2
ATP and ADP
citric acid
acetyl – CoA
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Each pair of high-energy electrons that
moves down the electron transport chain
provides enough energy to
1.
transport water molecules
across the membrane.
convert 3 ADP molecules into
3 ATP molecules.
convert carbon dioxide into
water molecules.
break glucose into pyruvic
acid.
2.
3.
4.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
The energy of the electrons passing along
the electron transport chain is used to make
1.
2.
3.
4.
1
lactic acid.
citric acid.
alcohol.
ATP.
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Breathing heavily after running
a race is your body’s way of
1. making more citric
acid.
2. repaying an oxygen
debt.
3. restarting glycolysis.
4. recharging the
electron transport
chain.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
When the body needs to exercise for longer
than 90 seconds, it generates ATP by
carrying out
25% 25%
25%
25%
1. lactic acid
fermentation.
2. alcoholic
fermentation.
3. cellular
respiration.
4. glycolysis.
1
2
3
4
5
1
2
3
4
If you want to control your weight, how long
should you exercise aerobically each time
that you exercise?
25% 25%
25%
25%
1. at least 90
seconds
2. less than 15
minutes
3. 15 to 20 minutes
4. more than 20
minutes
1
2
3
4
5
1
2
3
4
The energy needed to win a 2-minute
footrace is produced mostly by
1. lactic acid
fermentation.
2. cellular respiration.
3. using up stores of
ATP.
4. breaking down fats.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Which statement mainly explains why even wellconditioned athletes have to pace themselves for
athletic events that last several hours?
1.
Lactic acid fermentation can cause
muscle soreness.
Heavy breathing is needed to get rid of
lactic acid.
Cellular respiration releases energy
more slowly than fermentation does.
all of the above
2.
3.
4.
1
2
3
4
5
25%
1
25%
2
25%
3
25%
4
All of the following are sources of
energy during exercise EXCEPT
1. stored ATP.
2. alcoholic
fermentation.
3. lactic acid
fermentation.
4. cellular
respiration.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Which process does NOT
release energy from glucose?
1.
2.
3.
4.
1
glycolysis
photosynthesis
fermentation
cellular respiration
2
3
4
5
25%
1
25%
25%
2
3
25%
4
How are cellular respiration and
photosynthesis almost opposite processes?
1. Photosynthesis releases energy,
and cellular respiration stores
energy.
2. Photosynthesis removes carbon
dioxide from the atmosphere, and
cellular respiration puts it back.
3. Photosynthesis removes oxygen
from the atmosphere, and cellular
respiration puts it back.
4. all of the above
1
2
3
4
5
25%
1
25%
2
25%
3
25%
4
Photosynthesis is to chloroplasts
as cellular respiration is to
1.
2.
3.
4.
1
chloroplasts.
cytoplasm.
mitochondria.
nuclei.
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Unlike photosynthesis, cellular
respiration occurs in
1.
2.
3.
4.
1
animal cells only.
plant cells only.
all but plant cells.
all eukaryotic
cells.
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Plants cannot release energy
from glucose using
1.
2.
3.
4.
1
glycolysis.
photosynthesis.
the Krebs cycle.
cellular
respiration.
2
3
4
5
25%
1
25%
25%
2
3
25%
4
The products of photosynthesis
are the
1. products of cellular
respiration.
2. reactants of cellular
respiration.
3. products of
glycolysis.
4. reactants of
fermentation.
1
2
3
4
5
25%
1
25%
25%
2
3
25%
4
Cellular respiration releases energy by breaking
down glucose in the presence of carbon dioxide.
_________________________
1. True
2. False
1
2
3
4
50%
5
1
50%
2
If an animal cell stops carrying out cellular
respiration, it will die.
_________________________
1. True
50%
50%
2. False
1
2
3
4
5
1
2
The products of glycolysis are 2 ATP, 2
NADH, and 2 pyruvic acid molecules.
_________________________
1. True
50%
50%
2. False
1
2
3
4
5
1
2
Either cellular respiration or fermentation can be used to
release energy, depending on the presence of
carbohydrates. _________________________
1. True
2. False
1
2
3
4
50%
5
1
50%
2
The pathway labeled A in Figure 9–1 is
called glycolysis.
______________________________
1. True
Figure 9-1
2. False
50%
1
1
2
3
4
5
50%
2
If carbon dioxide is not present, the pathway
labeled C in Figure 9–1 usually will not
occur. _________________________
1. True
50%
50%
2. False
1
2
3
4
5
1
2
The Krebs cycle releases energy in the form
of ATP. _________________________
1. True
2. False
1
2
3
4
50%
5
1
50%
2
Without the Krebs cycle, the electron
transport chain would produce very few
ATPs. _________________________
1. True
50%
50%
2. False
1
2
3
4
5
1
2
carry electrons from the Krebs
cycle to the electron transport
chain.
_________________________
1. True
2. False
1
2
3
4
50%
5
1
50%
2
In prokaryotes, the electron transport chain is
located in the inner membrane of the mitochondria.
_________________________
1. True
2. False
1
2
3
4
50%
5
1
50%
2
If you swim aerobically for 30 minutes, your body has
probably started to break down stored molecules, such as
fats, for energy. _________________________
1. True
2. False
1
2
3
4
50%
5
1
50%
2
The first few seconds of intense exercise
use up the cell’s stores of fat.
_________________________
1. True
50%
50%
2. False
1
2
3
4
5
1
2
During the course of a long race, a person’s muscle cells
will use both cellular respiration and lactic acid fermentation
to produce ATP. _________________________
1. True
2. False
1
2
3
4
50%
5
1
50%
2
The reactants of photosynthesis are the
same as the reactants of cellular respiration.
_________________________
1. True
50%
50%
2. False
1
2
3
4
5
1
2
During photosynthesis, energy is stored in
the form of fats.
_________________________
1. True
50%
50%
2. False
1
2
3
4
5
1
2
Participant Scores
0
0
Participant 1
Participant 2
0
0
0
Participant 3
Participant 4
Participant 5
Cellular respiration occurs only in the
presence of ____________________.
1
2
3
4
5
0 of 5
The three main stages of cellular respiration
are _____________________, the Krebs
cycle, and ________________________.
1
2
3
4
5
0 of 5
Without oxygen, a cell can extract a net gain
of only ____________________ molecules
of ATP from each glucose molecule.
1
2
3
4
5
0 of 5
Glycolysis converts glucose into two
molecules of
_________________________.
1
2
3
4
5
0 of 5
Figure 9–1
The pathway labeled B in Figure 9–1 is
called ____________________
fermentation.
1
2
3
4
5
0 of 5
Based on Figure 9–1,
____________________ ATP molecules are
formed by fermentation.
1
2
3
4
5
0 of 5
In Figure 9–1, only the pathway labeled
____________________ requires oxygen.
1
2
3
4
5
0 of 5
Two turns of the Krebs cycle will result in
____________________ ATP molecules.
1
2
3
4
5
0 of 5
If two pairs of electrons move down the electron transport
chain, they will provide enough energy to produce about
____________________ ATP molecules.
1
2
3
4
5
0 of 5
The _____________________________ is
a series of carrier proteins.
1
2
3
4
5
0 of 5
The body gets rid of lactic acid in a chemical
pathway that requires
____________________.
1
2
3
4
5
0 of 5
A high level of lactic acid in the blood is a sign that
______________________________ has
occurred.
1
2
3
4
5
0 of 5
A person who regularly does aerobic
exercise takes in ____________________
oxygen than a sedentary person.
1
2
3
4
5
0 of 5
If all autotrophs on Earth suddenly stopped
carrying out _________________________,
cellular respiration would eventually stop too.
1
2
3
4
5
0 of 5
Photosynthesis occurs only in plants, algae, and some
bacteria. In contrast, ______________________________
occurs in all eukaryotic cells.
1
2
3
4
5
0 of 5
What is cellular respiration?
1
2
3
4
5
0 of 5
List the three main stages of cellular
respiration in order. Where does each stage
take place in the cell?
1
2
3
4
5
0 of 5
Cellular respiration is able to extract about 38 percent of
the potential energy from glucose. What happens to the
rest of the energy? Give an example
1
2
3
4
5
0 of 5
What happens during
glycolysis?
1
2
3
4
5
0 of 5
Describe glycolysis in terms of energy input,
energy output, and net gain of ATP.
1
2
3
4
5
0 of 5
Give two examples of
fermentation.
1
2
3
4
5
0 of 5
What are the two types of fermentation?
How do their products differ?
1
2
3
4
5
0 of 5
Figure 9–1
Based on Figure 9–1, which type of
fermentation does NOT give off carbon
dioxide? Explain your answer
1
2
3
4
5
0 of 5
What are the energy totals produced by one
molecule of pyruvic acid entering the Krebs
cycle?
1
2
3
4
5
0 of 5
Why is the Krebs cycle also
known as the citric acid cycle?
1
2
3
4
5
0 of 5
What is the main function of the
electron transport chain?
1
2
3
4
5
0 of 5
What role does oxygen play in
the electron transport chain?
1
2
3
4
5
0 of 5
What three sources of ATP does your body
use during a long aerobic exercise session?
1
2
3
4
5
0 of 5
What is an oxygen debt?
1
2
3
4
5
0 of 5
What roles does oxygen play in
photosynthesis and in cellular respiration?
1
2
3
4
5
0 of 5
What would happen if all the energy in glucose were
released in just one step instead of gradually as it is in
cellular respiration? How is the gradual process of cellular
respiration advantageous to the cell?
1
2
3
4
5
0 of 5
List the main events of glycolysis. How many ATP
molecules are produced and consumed by glycolysis?
What effect does the presence of oxygen have on the
events that follow glycolysis?
1
2
3
4
5
0 of 5
Compare lactic acid fermentation with alcoholic
fermentation. Where does each process occur?
What are the products of each process?
1
2
3
4
5
0 of 5
People who suffer from a heart attack often have an increased ratio of
lactic acid to pyruvic acid in their hearts. What does this observation
say about the availability of oxygen in the heart muscle cells of
someone who has had a heart attack? How could you use this
information to screen people who might be at risk for a heart attack?
1
2
3
4
5
0 of 5
Describe the main steps and the results
of one turn of the Krebs cycle.
1
2
3
4
5
0 of 5
Identify the electron carriers of cellular respiration.
Discuss the relationship between the electron
carriers and the electron transport chain.
1
2
3
4
5
0 of 5
Explain how high-energy electrons are
used by the electron transport chain.
1
2
3
4
5
0 of 5
Which pathways does the body use to
release energy during exercise? Discuss
these pathways in terms of a footrace
1
2
3
4
5
0 of 5
What happens to muscle cells
during intense physical activity?
1
2
3
4
5
0 of 5
Compare photosynthesis with
cellular respiration.
1
2
3
4
5
0 of 5