UA BSC 108 EXAM 2 300 MULTIPLE-
CHOICE QUESTIONS AND ANSWERS
WITH DETAILED RATIONALES LATEST
UPDATE THIS YEAR
Question 1
What is the primary function of cellular respiration?
A) To produce glucose from carbon dioxide and water
B) To capture light energy from the sun
C) To provide cells with the energy they need to function
D) To synthesize proteins from amino acids
Correct Answer: C
Rationale: Cellular respiration is the process that releases energy from glucose and
other organic molecules, converting it into ATP, which cells use to perform work.
Option A describes photosynthesis, Option B also describes photosynthesis, and
Option D describes protein synthesis.
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Question 2
Where in the cell does glycolysis take place?
A) Mitochondrial matrix
,B) Inner mitochondrial membrane
C) Cytoplasm
D) Nucleus
Correct Answer: C
Rationale: Glycolysis, the first stage of cellular respiration, occurs in the cytoplasm
of the cell. It does not require oxygen and takes place outside the mitochondria.
The mitochondrial matrix is the site of the citric acid cycle, and the inner
mitochondrial membrane is where the electron transport chain is located.
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Question 3
How do autotrophs differ from heterotrophs?
A) Autotrophs consume other organisms; heterotrophs make their own food
B) Autotrophs make their own energy; heterotrophs must consume other organisms
to get their energy
C) Autotrophs are always multicellular; heterotrophs are always unicellular
D) Autotrophs require oxygen; heterotrophs do not
Correct Answer: B
Rationale: Autotrophs are organisms that produce their own organic molecules
from inorganic sources (e.g., through photosynthesis), while heterotrophs obtain
energy by consuming other organisms. Option A reverses the definitions. Options
C and D are incorrect generalizations.
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,Question 4
Write the overall equation for cellular respiration.
A) 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
B) C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + ATP
C) C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
D) 6CO₂ + 6H₂O + ATP → C₆H₁₂O₆ + 6O₂
Correct Answer: B
Rationale: The overall equation for cellular respiration is glucose + oxygen →
carbon dioxide + water + energy (ATP). Option A is the equation for
photosynthesis. Option C is missing ATP, and Option D is incorrect.
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Question 5
What is the difference between aerobic and anaerobic respiration?
A) Aerobic respiration produces more ATP than anaerobic respiration
B) Anaerobic respiration requires oxygen; aerobic respiration does not
C) Aerobic respiration can only occur in the presence of oxygen; anaerobic
respiration occurs when oxygen is not present
D) Aerobic respiration occurs in the cytoplasm; anaerobic respiration occurs in the
mitochondria
Correct Answer: C
Rationale: Aerobic respiration requires oxygen and produces carbon dioxide,
water, and ATP. Anaerobic respiration occurs in the absence of oxygen and
involves glycolysis followed by fermentation. Option A is true but not the defining
difference. Option B reverses the definitions. Option D is incorrect.
, ---
Question 6
List the inputs of glycolysis.
A) Glucose, 2 ATP, 2 NAD⁺, 4 ADP + P
B) 2 Pyruvates, 4 ATP, 2 NADH + H⁺, 2 H₂O
C) Glucose, 4 ATP, 2 NADH
D) 2 Acetyl CoA, 6 NAD⁺, 2 FAD
Correct Answer: A
Rationale: The inputs of glycolysis are glucose, 2 ATP (used to start the process), 2
NAD⁺, and 4 ADP + P. Option B lists the outputs of glycolysis. Option D lists
inputs of the citric acid cycle.
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Question 7
List the outputs of glycolysis.
A) Glucose, 2 ATP, 2 NAD⁺, 4 ADP + P
B) 2 Pyruvates, 4 ATP, 2 NADH + H⁺, 2 H₂O
C) 2 Acetyl CoA, 2 ATP, 6 NADH
D) 4 CO₂, 2 ATP, 6 NADH + H⁺, 2 FADH₂
Correct Answer: B
CHOICE QUESTIONS AND ANSWERS
WITH DETAILED RATIONALES LATEST
UPDATE THIS YEAR
Question 1
What is the primary function of cellular respiration?
A) To produce glucose from carbon dioxide and water
B) To capture light energy from the sun
C) To provide cells with the energy they need to function
D) To synthesize proteins from amino acids
Correct Answer: C
Rationale: Cellular respiration is the process that releases energy from glucose and
other organic molecules, converting it into ATP, which cells use to perform work.
Option A describes photosynthesis, Option B also describes photosynthesis, and
Option D describes protein synthesis.
---
Question 2
Where in the cell does glycolysis take place?
A) Mitochondrial matrix
,B) Inner mitochondrial membrane
C) Cytoplasm
D) Nucleus
Correct Answer: C
Rationale: Glycolysis, the first stage of cellular respiration, occurs in the cytoplasm
of the cell. It does not require oxygen and takes place outside the mitochondria.
The mitochondrial matrix is the site of the citric acid cycle, and the inner
mitochondrial membrane is where the electron transport chain is located.
---
Question 3
How do autotrophs differ from heterotrophs?
A) Autotrophs consume other organisms; heterotrophs make their own food
B) Autotrophs make their own energy; heterotrophs must consume other organisms
to get their energy
C) Autotrophs are always multicellular; heterotrophs are always unicellular
D) Autotrophs require oxygen; heterotrophs do not
Correct Answer: B
Rationale: Autotrophs are organisms that produce their own organic molecules
from inorganic sources (e.g., through photosynthesis), while heterotrophs obtain
energy by consuming other organisms. Option A reverses the definitions. Options
C and D are incorrect generalizations.
---
,Question 4
Write the overall equation for cellular respiration.
A) 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
B) C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + ATP
C) C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
D) 6CO₂ + 6H₂O + ATP → C₆H₁₂O₆ + 6O₂
Correct Answer: B
Rationale: The overall equation for cellular respiration is glucose + oxygen →
carbon dioxide + water + energy (ATP). Option A is the equation for
photosynthesis. Option C is missing ATP, and Option D is incorrect.
---
Question 5
What is the difference between aerobic and anaerobic respiration?
A) Aerobic respiration produces more ATP than anaerobic respiration
B) Anaerobic respiration requires oxygen; aerobic respiration does not
C) Aerobic respiration can only occur in the presence of oxygen; anaerobic
respiration occurs when oxygen is not present
D) Aerobic respiration occurs in the cytoplasm; anaerobic respiration occurs in the
mitochondria
Correct Answer: C
Rationale: Aerobic respiration requires oxygen and produces carbon dioxide,
water, and ATP. Anaerobic respiration occurs in the absence of oxygen and
involves glycolysis followed by fermentation. Option A is true but not the defining
difference. Option B reverses the definitions. Option D is incorrect.
, ---
Question 6
List the inputs of glycolysis.
A) Glucose, 2 ATP, 2 NAD⁺, 4 ADP + P
B) 2 Pyruvates, 4 ATP, 2 NADH + H⁺, 2 H₂O
C) Glucose, 4 ATP, 2 NADH
D) 2 Acetyl CoA, 6 NAD⁺, 2 FAD
Correct Answer: A
Rationale: The inputs of glycolysis are glucose, 2 ATP (used to start the process), 2
NAD⁺, and 4 ADP + P. Option B lists the outputs of glycolysis. Option D lists
inputs of the citric acid cycle.
---
Question 7
List the outputs of glycolysis.
A) Glucose, 2 ATP, 2 NAD⁺, 4 ADP + P
B) 2 Pyruvates, 4 ATP, 2 NADH + H⁺, 2 H₂O
C) 2 Acetyl CoA, 2 ATP, 6 NADH
D) 4 CO₂, 2 ATP, 6 NADH + H⁺, 2 FADH₂
Correct Answer: B
