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Question 1
NADH is made during –
a.
b.
c.
d.
Glycolysis
Pyruvate oxidation
Krebs cycle
All of the above
Question 2
Most of the ATP made by aerobic respiration is
made during –
a.
b.
c.
d.
e.
Glycolysis
Electron transport chain
Pyruvate oxidation
Krebs cycle
Substrate-level phosphorylation (what is the
difference between substrate-level and oxidative
phosphorylation, anyway?)
Question 3
Glycolysis costs ____ATPs, but makes
___ATPs; thus it has a net yield of ___ATPs.
a.
b.
c.
d.
e.
3, 6, 3
2, 4, 2
2, 2, 0
0, 2, 2
4, 8, 4
Question 4
The 2 carbons in acetyl–CoA can eventually
used to help form —
a.
b.
c.
d.
e.
Glucose
ATP
Pyruvate
Oxaloacetate
Carbon dioxide
Question 5
All of the glycolysis reactions do not require
oxygen (aerobic environment) and can take
place in an anaerobic (without oxygen)
environment.
a. This is true
b. This is false
Question 6
What is the function of the coenzymes, NADH
and FADH2 ?
a. Charging electrons to power ATP synthase
b. Catalyzing the formation of acetyl-CoA
c. Providing electrons and H+ to the electron
transport chain
d. Transporting CO2 into the mitochondria
e. Acting as a terminal electron acceptor
Question 7
Lactic acid fermentation is an anaerobic
process?
a. This is true
b. This is false
Question 8
The theoretical ATP yield is 38 for
prokaryotes and 36 for eukaryotes. Why is
there a difference?
a. 2 ATPs are used during glycolysis for
prokaryotes but not eukaryotes
b. The Krebs cycle only occurs in eukaryotes
c. No FADH2 is produced in prokaryotic
respiration
d. NADH made during glycolysis must be
transported into the mitochondria of
eukaryotes.
Question 9
An experimental drug blocks the decarboxylation
reactions that convert pyruvate into acetyl-CoA.
A cell treated with this drug would not be able to
complete glycolysis.
a. This is true
b. This is false
Question 10
When making wine, grape juice and yeast are
sealed into a container. Why must the container
be air tight?
a. To prevent the buildup of lactic acid
b. Fermentation only occurs in the absence of
oxygen
c. Yeast cannot live in aerobic environments
d. To prevent the yeasts from dying
e. To increase the production of acetyl-CoA
Question 11
What happens to the electron’s energy as it
moves through the electron transport chain?
a. The electrons gain energy through each
transfer
b. The electrons lose energy through each
transfer
c. The energy content is unchanged
d. The energy drops to a different orbital
Question 12
During a heart attack blood flow to the
cardiac muscle is restricted. How would this
affect cellular respiration?
a.
b.
c.
d.
ATP production would be increased
ATP production would remain unchanged
ATP production would be decreased
The cell would switch to alcohol fermentation
Answer Key to MC questions
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
D
B
B
A
A
C
A
D
B
B
B
C
Study Activities:
1. Draw out the entire pathway of cellular respiration, starting with
glycolysis, going through pyruvate oxidation, moving through the
Krebs (Citric Acid) Cycle, ending with the electron transport chain
and oxidative phoshorylation. You do not need to memorize each
compound at every step, or the enzymes that catalyze every step,
but by writing these out, you will gain an appreciation for the
amazing biochemistry that is used to harvest energy from glucose.
2. After the above, write out an ”accounting sheet” that accounts for
the production of NADH, FADH2, and ATP in the above pathway.
3. Explain the difference in theoretical yields of ATP by respiration in
bacteria (prokaryotes) vs. eukaryotes [e.g. yeast, humans, fruit flies
]