AnswersPA Human Anatomy Physiology A 2026-2027 SMITH ICCatalysts

Cellular Respiration Answers

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The Venn diagram compares aerobic respiration and anaerobic respiration.Which statement could be categorized only in the anaerobic section of the Venn diagram?

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A
is performed by eukaryotes
B
has commercial uses
C
regenerates NADH
D
occurs in the mitochondria
2
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During glycolysis, glucose is broken down into two molecules of pyruvate. What is the main transformation that occurs during glycolysis?

Question illustration
A
Glycolysis produces ATP and pyruvate by oxidizing water.
B
Glycolysis produces ATP and pyruvate by oxidizing glucose and NAD+.
C
Glycolysis produces pyruvate, ATP, and NADH by oxidizing glucose.
D
Glycolysis produces CO2, ATP, and pyruvate by reducing glucose.
3

What do aerobic respiration and anaerobic respiration have in common?

A
Both begin with glycolysis.
B
Both occur in mitochondria.
C
Both require oxygen to proceed.
D
Both end with the electron transport chain.
4

Consider the stage of cellular respiration that is shown in the diagram.What is the net ATP gain at this stage of cellular respiration?

Question illustration
A
2
B
4
C
32
D
36
5

Which statement about anaerobic respiration is true?

A
Anaerobic respiration prevents muscle fatigue.
B
Anaerobic respiration generates a high yield of ATP.
C
Anaerobic respiration is used commercially in the production of beer, wine, bread, yogurt, and cheese.
D
Anaerobic respiration can provide energy to animals for several days in the absence of oxygen.
6

Which statement describes the reaction for cellular respiration?

A
The equation is carbon dioxide + water glucose + oxygen + water and energy is required in the form of light
Option A
B
The equation is glucose + oxygen carbon dioxide + water and energy is produced in the form of ATP.
Option B
C
The equation is carbon dioxide + water glucose + oxygen + water and energy is produced in the form of ATP.
Option C
D
The equation is glucose + oxygen carbon dioxide + water and energy is required in the form of light.
Option D
7

What do alcohol fermentation, acetyl CoA formation, and the Krebs cycle have in common?

A
All produce water.
B
All produce carbon dioxide.
C
All produce ATP.
D
All produce alcohol.
8

Which is a commercial use for lactic acid fermentation?

A
making starch
B
making bread
C
making wine
D
making cheese
9

Which statement about cellular respiration is true?

A
It produces oxygen.
B
It requires water.
C
It is used by every living cell.
D
It converts energy to food.
10

What is the main difference between aerobic respiration and anaerobic respiration?

A
Aerobic respiration requires oxygen to proceed, but anaerobic respiration does not.
B
Aerobic respiration occurs during photosynthesis, but anaerobic respiration occurs during cellular respiration.
C
Aerobic respiration produces ATP, but anaerobic respiration does not.
D
Aerobic respiration involves glycolysis, but anaerobic respiration does not.
11

The graphic shows the citric acid cycle. During the citric acid cycle, what happens to acetyl-CoA?

Question illustration
A
It enters the citric acid cycle and gains carbon dioxide to form citric acid, and gains more carbon dioxide through redox reactions to form a 4-carbon molecule.
B
It enters the citric acid cycle and associates with a 4-carbon molecule, forming citric acid, and then through redox reactions regenerates the 4-carbon molecule.
C
It enters glycolysis and associates with a 5-carbon molecule through redox reactions, forming another acetyl-CoA molecule.
D
It enters the citric acid cycle and associates with a 4-carbon molecule, forming a 5-carbon compound, and then through oxidation reactions regenerates the 4-carbon molecule.
12

What is the overall net gain of ATP in aerobic respiration per one molecule of glucose?

A
between 0-10
B
between 10-20
C
between 30-40
D
between 40-50
13

Which process occurs within the mitochondria?

A
lactic acid fermentation
B
alcohol fermentation
C
glycolysis
D
Krebs cycle
14

Which is a similarity between alcohol fermentation and aerobic respiration?

A
Both require oxygen.
B
Both require light energy.
C
Both start with glycolysis.
D
Both produce alcohol.

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