McCance & Huether’s Pathophysiology
The Biologic Basis for Disease in Adults
and Children
9th Edition
Author(s)Julia Rogers
TEST BANK
Q1. A research laboratory compares two newly isolated
organisms. One organism lacks membrane-bound
, organelles and contains circular DNA suspended within the
cytoplasm. The second contains a nucleus, endoplasmic
reticulum, and mitochondria. The structural distinction
most directly explains which functional difference?
A. Ability to synthesize proteins on ribosomes
B. Ability to generate ATP through metabolic pathways
C. Capacity for compartmentalized intracellular processes
D. Presence of a plasma membrane lipid bilayer
Correct Answer: C
Rationale:
• Clinical Clue: Presence versus absence of membrane-
bound organelles distinguishes eukaryotes from
prokaryotes.
• Mechanism: Membrane-bound structures create
specialized intracellular environments allowing
segregation of biochemical processes.
• Why the Correct Answer Is Right: Eukaryotic cells organize
functions such as protein modification, energy production,
and DNA processing into distinct compartments.
• Why the Other Options Are Wrong:
A. Both cell types possess ribosomes.
B. ATP production occurs in both groups, although
mechanisms differ.
D. Plasma membranes exist in both.
,• Exam Trap: Assuming mitochondria are required for ATP
generation.
• High-Yield Clinical Correlation: Loss of intracellular
compartment organization contributes to impaired cellular
specialization.
• Memory Anchor: "Eukaryotes = enclosed workspaces."
Q2. A child with a rare genetic disorder develops recurrent
bacterial infections because neutrophils exhibit defective
intracellular degradation of pathogens despite normal
ingestion. The impaired process most likely involves
dysfunction of which cellular structure?
A. Golgi apparatus
B. Lysosome
C. Nucleolus
D. Smooth endoplasmic reticulum
Correct Answer: B
Rationale:
• Clinical Clue: Normal phagocytosis with defective
intracellular destruction suggests impaired digestion.
• Mechanism: Lysosomes contain hydrolytic enzymes
responsible for degradation of internalized material.
, • Why the Correct Answer Is Right: Fusion of lysosomes with
phagosomes forms phagolysosomes that destroy
pathogens.
• Why the Other Options Are Wrong:
A. Golgi modifies and packages proteins.
C. Nucleolus synthesizes ribosomal RNA.
D. Smooth ER synthesizes lipids and detoxifies substances.
• Exam Trap: Confusing phagocytosis with pathogen
destruction.
• High-Yield Clinical Correlation: Lysosomal disorders often
produce accumulation of undegraded material.
• Memory Anchor: "Lysosomes = intracellular recycling
units."
Q3. A patient with severe alcohol use disorder
demonstrates hepatocyte enlargement and increased
detoxification enzyme activity. The adaptive cellular
change most directly involves expansion of which
organelle?
A. Rough endoplasmic reticulum
B. Smooth endoplasmic reticulum
C. Golgi apparatus
D. Mitochondria
Correct Answer: B
The Biologic Basis for Disease in Adults
and Children
9th Edition
Author(s)Julia Rogers
TEST BANK
Q1. A research laboratory compares two newly isolated
organisms. One organism lacks membrane-bound
, organelles and contains circular DNA suspended within the
cytoplasm. The second contains a nucleus, endoplasmic
reticulum, and mitochondria. The structural distinction
most directly explains which functional difference?
A. Ability to synthesize proteins on ribosomes
B. Ability to generate ATP through metabolic pathways
C. Capacity for compartmentalized intracellular processes
D. Presence of a plasma membrane lipid bilayer
Correct Answer: C
Rationale:
• Clinical Clue: Presence versus absence of membrane-
bound organelles distinguishes eukaryotes from
prokaryotes.
• Mechanism: Membrane-bound structures create
specialized intracellular environments allowing
segregation of biochemical processes.
• Why the Correct Answer Is Right: Eukaryotic cells organize
functions such as protein modification, energy production,
and DNA processing into distinct compartments.
• Why the Other Options Are Wrong:
A. Both cell types possess ribosomes.
B. ATP production occurs in both groups, although
mechanisms differ.
D. Plasma membranes exist in both.
,• Exam Trap: Assuming mitochondria are required for ATP
generation.
• High-Yield Clinical Correlation: Loss of intracellular
compartment organization contributes to impaired cellular
specialization.
• Memory Anchor: "Eukaryotes = enclosed workspaces."
Q2. A child with a rare genetic disorder develops recurrent
bacterial infections because neutrophils exhibit defective
intracellular degradation of pathogens despite normal
ingestion. The impaired process most likely involves
dysfunction of which cellular structure?
A. Golgi apparatus
B. Lysosome
C. Nucleolus
D. Smooth endoplasmic reticulum
Correct Answer: B
Rationale:
• Clinical Clue: Normal phagocytosis with defective
intracellular destruction suggests impaired digestion.
• Mechanism: Lysosomes contain hydrolytic enzymes
responsible for degradation of internalized material.
, • Why the Correct Answer Is Right: Fusion of lysosomes with
phagosomes forms phagolysosomes that destroy
pathogens.
• Why the Other Options Are Wrong:
A. Golgi modifies and packages proteins.
C. Nucleolus synthesizes ribosomal RNA.
D. Smooth ER synthesizes lipids and detoxifies substances.
• Exam Trap: Confusing phagocytosis with pathogen
destruction.
• High-Yield Clinical Correlation: Lysosomal disorders often
produce accumulation of undegraded material.
• Memory Anchor: "Lysosomes = intracellular recycling
units."
Q3. A patient with severe alcohol use disorder
demonstrates hepatocyte enlargement and increased
detoxification enzyme activity. The adaptive cellular
change most directly involves expansion of which
organelle?
A. Rough endoplasmic reticulum
B. Smooth endoplasmic reticulum
C. Golgi apparatus
D. Mitochondria
Correct Answer: B
