WorksheetsAP Bio Cell Respiration
Total questions: 29
Worksheet time: 37mins
Name
Class
Date
1.
A weightlifter is using heavy weights in short bursts for a competition. Because his muscle cells are not able to take in enough oxygen to make very much ATP the weightlifter begins to get fatigue in his muscles. Which of the following processes is most likely going on in the muscles of the weightlifter as he competes in his event?
a)
As the cells run out of oxygen they switch to anaerobic respiration, which allows the cell to make small amounts of ATP in the absence of oxygen.
b)
As the cells run out of oxygen, they die off gradually and the weightlifter's muscles have fewer contracting muscle cells.
c)
The cells will never run out of oxygen if the weightlifter is breathing.
d)
As the cells run out of oxygen, they will continue to make the same amount of ATP, since oxygen is not required to make ATP.
2.
Which process takes place in the presence of oxygen and produces nearly 20 times as much as ATP as glycolysis alone?
a)
photosynthesis
b)
lactic acid fermentation
c)
aerobic respiration
d)
alcoholic fermentation
3.
Two different species of bacteria are examined. Scientists find that species X always produces CO2 and H2O during cellular respiration. Species Y always produces ethyl alcohol and CO2. Which conclusion can be made from these observations?
a)
Only species Y is aerobic.
b)
Only species Y is anaerobic
c)
Both species X and Y are aerobic.
d)
Both species X and Y are anaerobic.
4.
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
5.
Where does glycolysis occur?
a)
Inner mitochondrial membrane
b)
Mitochondrial Matrix
c)
Cytosol
d)
At a ribosome
6.
Glycolysis is a _______ process
a)
Anabolic
b)
Catabolic
c)
Single Step
d)
Strictly Eukaryotic
7.
NADH is a ______ form of NAD+.
a)
Reduced
b)
Oxidized
c)
Catabolized
d)
Hydrolized
8.
Which molecule enters Kreb's Cycle?
a)
Pyruvate
b)
Glucose
c)
Acetyl CoA
d)
reducing powers
9.
What enzyme in the ETC is responsible for generating the ATP molecules?
a)
ATPase
b)
ATP synthase
c)
Hexokinase
d)
none of the above
10.
Where does ETC occur?
a)
Mitochondrial matrix
b)
Outer mitochondrial membrane
c)
Inner mitochondrial membrane
d)
Cytosol
11.
After strenuous exercise, a muscle cell would contain decreased amounts of ______ and increased amounts of ______ ____
a)
glucose ATP
b)
ATP glucose
c)
oxygen lactic acid
d)
lactic acid ATP
12.
Location of ATP synthase
a)
1
b)
2
c)
3
d)
4
13.
Site of the krebs cycle
a)
1
b)
2
c)
3
d)
4
14.
Which process in eukaryotic cells will proceed normally whether oxygen (O2) is present or absent?
a)
electron transport
b)
glycolysis
c)
the citric acid cycle (Krebs)
d)
oxidative phosphorylation
15.
During cellular respiration, acetyl CoA accumulates in which location?
a)
Mitochondrial Matrix
b)
mitochondrial outer membrane
c)
mitochondrial inner membrane
d)
mitochondrial intermembrane space
16.
Which of the following occurs in the cytosol of a eukaryotic cell?
a)
glycolysis and fermentation
b)
citric acid cycle
c)
fermentation and chemiosmosis
d)
oxidative phosphorylation
17.
The ATP made during fermentation (including glycolysis) is generated by which of the following?
a)
the electron transport chain
b)
substrate-level phosphorylation
c)
chemiosmosis
d)
oxidative phosphorylation
18.
At what point in cellular respiration is the majority of the NADH produced?
a)
Glycolysis
b)
Pyruvate Oxidation
c)
Citric Acid (Krebs) Cycle
d)
Electron Transport Chain
19.
How is a molecule oxidized?
a)
Electrons are added to the molecule
b)
Electrons are taken from the molecule
c)
Electrons are shared with the molecule
d)
Protons are added to the molecule
20.
Which of the following statements are false?
a)
Glycolysis can occur with or without oxygen
b)
Glycolysis is the first step in both anaerobic and aerobic respiration
c)
Glycolysis occurs in the mitochondria
d)
Glycolysis produces 2 ATP, 2 Pyruvates, and 2 NADH
21.
At the end of the Kreb's cycle, where is most of the energy from the original glucose stored?
a)
in CO2
b)
in ATP
c)
in NADH
d)
in pyruvate
22.
During chemiosmosis
a)
H+ ions serve as the final electron acceptor
b)
a concentration gradient is generated when H+ ions are passively transported from the matrix to the intermembrane space of the mitochondrion
c)
energy is released as H+ ions move freely across the mitochondrial membrane
d)
ATP is synthesized when H+ ions move through a channel in ATP synthase
23.
What are the stages of cellular respiration in order?
"citric acid cycle" = Krebs Cycle
"citric acid cycle" = Krebs Cycle
a)
glycolysis, oxidative phosphorylation, the citric acid cycle
b)
oxidative phosphorylation, glycolysis, the citric acid cycle
c)
glycolysis, the citric acid cycle, oxidative phosphorylation
d)
the citric acid cycle, oxidative phosphorylation, glycolysis
24.
What is the main purpose of the Krebs cycle?
a)
to produce ATP
b)
to produce electron donators
c)
to produce water
d)
to produce carbon dioxide
25.
Use the diagram to answer the question. Between which parts of the molecule must the bonds be broken to form an ADP molecule?
a)
A and B
b)
A and C
c)
B and C
d)
C and D
26.
The main purpose of anaerobic respiration is to
a)
produce oxygen
b)
replenish NAD+ for glycolysis
c)
replenish oxaloacetic acid for the Krebs cycle
d)
produce ATP
27.
Which of the following is not an end product of the Kreb's cycle?
a)
FADH2
b)
CO2
c)
pyruvate
d)
ATP
28.
In the instances we have investigated, when a phosphate is added to a molecule, either by substrate-level phosphorylation or oxidative phosphorylation, that molecule now has
a)
less free energy
b)
more free energy
c)
the ability to transport electrons
d)
the ability to act as a final electron acceptor
29.
The primary role of oxygen in cellular respiration is to
a)
yield energy in the form of ATP as it is passed down the respiratory chain.
b)
act as an acceptor for electrons and hydrogen, forming water.
c)
combine with carbon, forming CO2.
d)
combine with lactate, forming pyruvate.
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