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Multiple Choice Quiz
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1
All of the potential energy in the bonds of glucose is transformed into energy in ATP molecules.
A)True
B)False
2
Which of the following is a coenzyme associated with cellular respiration?
A)NAD+
B)O2
C)FAD
D)both A and C
3
Since glucose is a high-energy molecule and its metabolites, CO2 and H2O are low-energy molecules, the breakdown of glucose would be described as an _____ reaction.
A)exergonic
B)endergonic
4
NAD+ is _____ when it accepts two electrons and a hydrogen ion (H+).
A)reduced
B)oxidized
5
About _____ of the energy in glucose is transformed into ATP.
A)5%
B)40%
C)75%
D)100%
6
The conversion of the energy in glucose to ATP is more efficient than the conversion of the energy in gasoline to the movement of a car.
A)True
B)False
7
Which of the following statements correctly describes glycolysis?
A)Glycolysis occurs in the mitochondria.
B)glycolysis requires O2.
C)Glycolysis produces two molecules of pyruvate.
D)all of the above
8
Which of the following is not a product of the complete breakdown of glucose?
A)O2
B)CO2
C)ATP
D)H2O
9
The first phase of glucose metabolism is _____.
A)the Citric Acid cycle
B)glycolysis
C)the electron transport system
D)the transition reaction
10
The coenzymes NAD and FAD carry electrons to the _____.
A)nucleus
B)Citric Acid cycle
C)plasma membrane
D)electron transport system
11
Cells only need a small amount of NAD+ because each NAD+ can be used to transport electrons over and over.
A)True
B)False
12
Since it is universally found in organisms, researchers believe_____ evolved first.
A)the electron transport system
B)Citric Acid cycle
C)glycolysis
13
The net gain of ATP from glycolysis is two even though four ATP are actually produced.
A)True
B)False
14
The inputs of glycolysis include _____.
A)glucose
B)NAD+
C)ATP
D)all of the above
15
When a phosphate is transferred from a high-energy molecule of ADP to form ATP it's referred to as _____.
A)photophosphorylation
B)substrate-level phosphorylation
C)oxidative phosphorylation
16
Glycolysis occurs in the _____.
A)cytosol
B)matrix
C)cristae
D)nucleus
17
There are some bacteria that die in the presence of oxygen.
A)True
B)False
18
There is/are _____ pyruvate molecule(s) produced per glucose molecule during glycolysis.
A)one
B)two
C)six
D)ten
19
If oxygen is not available _____ follows glycolysis.
A)fermentation
B)the transition reaction
C)the Citric Acid cycle
D)the electron transport system
20
When oxygen is available, pyruvate enters the _____.
A)nucleus
B)chloroplast
C)plasma membrane
D)mitochondria
21
Each of the two pyruvates produced during glycolysis has _____ carbons.
A)3
B)6
C)12
D)36
22
Which of the following is NOT a product (an output) of glycolysis?
A)NADH
B)pyruvate
C)CO2
D)ATP
23
The "after taxes" (net gain) number of ATP produced during glycolysis is _____.
A)1
B)2
C)4
D)32
24
The ATP produced during glycolysis are produced by _____.
A)substrate-level phosphorylation
B)oxidative phosphorylation
C)photophosphorylation
25
Mitochondria are often called the powerhouses of a cell.
A)True
B)False
26
Many ATP are produced during the transition reaction.
A)True
B)False
27
The enzymes of the transition reaction and Citric Acid cycle are located in the _____.
A)cytosol
B)matrix
C)cristae
D)thylakoids
28
The __________ connects glycolysis to the Citric Acid cycle.
A)electron transport system
B)transition reaction
C)cristae
D)mitochondrial intermembrane
29
When electrons are removed from pyruvate in the transition reaction, they are accepted by _____.
A)acetyl Co-A
B)FAD
C)NAD+
D)ATP
30
Acetyl Co-A is formed during the transition reaction by attaching _____ to a two-carbon acetyl group.
A)NAD+
B)coenzyme A
C)pyruvate
D)oxaloacetate
31
The ATP produced during the Citric Acid cycle is produced by substrate-level phosphorylation.
A)True
B)False
32
The first metabolite of the Citric Acid cycle is __________.
A)lactate
B)pyruvate
C)oxaloacetate
D)citrate
33
The Citric Acid cycle turns twice for each original glucose molecule.
A)True
B)False
34
During the Citric Acid cycle, all of the electrons are accepted by the electron carrier NAD+.
A)True
B)False
35
Which of the following is an output of the Citric Acid cycle?
A)CO2
B)ATP
C)FADH2
D)all of the above
36
Which of the following Citric Acid cycle products is disposed of by our respiratory system when we exhale?
A)CO2
B)ATP
C)NADH
D)FADH2
37
The electrons that enter the electron transport system are carried there by _____.
A)NADH
B)FADH2
C)both A and B
38
The energy released by the electron transport system produces ATP by _____.
A)photophosphorylation
B)substrate-level phosphorylation
C)oxidative phosphorylation
39
The electron transport system is located in the _____.
A)stroma
B)matrix
C)cytosol
D)cristae
40
Cells must have many, many NAD+, FAD and ADP molecules on hand before cellular respiration can begin.
A)True
B)False
41
When O2 is reduced during the electron transport system, _____ is produced.
A)H2O
B)CO2
C)ADP
D)glucose
42
When NADH produced during the transition reaction and Citric Acid cycle delivers electrons to the electron transport system, _____ ATP is/are produced.
A)1
B)2
C)3
D)36
43
The final electron acceptor in the electron transport system is _____.
A)FADH2
B)O2
C)coenzyme Q
D)cytochrome b
44
How many ATP molecules are produced when FADH2 delivers electrons to the electron transport system?
A)1
B)2
C)4
D)36
45
Most of the ATP produced by cellular respiration is produced by oxidative phosphorylation and energy released by the electron transport system.
A)True
B)False
46
The NADH produced during glycolysis produces only 2 ATP in the electron transport system in all cells except heart, liver and bacterial cells.
A)True
B)False
47
Oxygen debt is _____.
A)the amount of oxygen needed to get rid of lactate
B)the amount of oxygen needed for cellular respiration
C)the amount of oxygen needed for glycolysis
D)the amount of oxygen the US owes Japan
48
Animal cells perform _____ fermentation.
A)lactate (lactic acid)
B)alcoholic
C)both A and B
49
Only two ATP are produced by glycolysis followed by fermentation.
A)True
B)False
50
The products of fermentation can be lethal to the cells which perform it.
A)True
B)False
51
Oxygen is needed for fermentation to proceed.
A)True
B)False
52
The product of alcoholic fermentation that allows us to make bread is _____.
A)O2
B)CO2
C)H2O
D)lactate
53
During fermentation, _____ is regenerated and it returns to glycolysis to pick up more electrons.
A)ATP
B)glucose
C)NAD+
D)pyruvate
54
Athletes' cells _____.
A)metabolize more fats for ATP which maintains blood glucose levels
B)have the same number of mitochondria as a "couch potato"
C)produce large quantities of lactate and H+
D)all of the above
55
Glucose is the only molecule that can be used to produce ATP.
A)True
B)False
56
Metabolites of glycolysis and the Citric Acid cycle can be converted to _____.
A)amino acids
B)glycerol
C)fatty acids
D)all of the above
57
Plants are able to synthesize all of the amino acids they need.
A)True
B)False
58
Fats are an efficient form of stored energy.
A)True
B)False
59
Catabolism _____.
A)breaks down molecules
B)tends to be exergonic
C)drives anabolism
D)all of the above
60
Excess carbohydrate intake can result in the formation of fat.
A)True
B)False







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