McCance & Huether’s Pathophysiology
The Biologic Basis for Disease in Adults
and Children
9th Edition
Author(s)Julia Rogers
TEST BANK
Q1. A researcher compares two cell populations. One lacks
membrane-bound organelles and reproduces by binary
fission; the other contains a nucleus and divides via
mitosis. The difference in genetic organization most
directly explains which functional distinction?
, A. Ability to perform oxidative phosphorylation
B. Dependence on ribosomal RNA for protein synthesis
C. Spatial separation of transcription and translation
D. Use of DNA as genetic material
Correct Answer: C
Rationale:
• Clinical Clue: Comparison of prokaryotic vs eukaryotic
cells.
• Mechanism: Eukaryotes compartmentalize transcription
(nucleus) and translation (cytoplasm), unlike prokaryotes.
• Why the Correct Answer Is Right: Nuclear membrane
enables spatial separation of gene expression steps.
• Why the Other Options Are Wrong: A: Both can generate
ATP (though differently). B: Both use rRNA. D: Both use
DNA.
• Exam Trap: Assuming only eukaryotes synthesize proteins.
• High-Yield Clinical Correlation: Antibiotics target
prokaryotic ribosomes due to structural differences.
• Memory Anchor: “Nucleus = separation of transcription.”
Q2. A patient with mitochondrial DNA mutation develops
muscle weakness. The clinical manifestations are best
explained by impaired:
, A. Glycolysis in cytosol
B. ATP generation via oxidative phosphorylation
C. Protein synthesis in rough ER
D. Lipid synthesis in smooth ER
Correct Answer: B
Rationale:
• Clinical Clue: Mitochondrial DNA mutation + muscle
weakness.
• Mechanism: Mitochondria generate ATP through oxidative
phosphorylation.
• Why the Correct Answer Is Right: High-energy tissues
depend on mitochondrial ATP.
• Why the Other Options Are Wrong: A: Glycolysis occurs in
cytosol, not mitochondria. C/D: ER functions unaffected
primarily.
• Exam Trap: Confusing glycolysis with mitochondrial ATP
production.
• High-Yield Clinical Correlation: Mitochondrial diseases
affect muscles and neurons.
• Memory Anchor: “Mitochondria = powerhouses.”
Q3. A mutation disrupts microtubule assembly. Which
cellular process is most directly impaired?
, A. Protein synthesis
B. Vesicular transport and mitotic spindle formation
C. DNA replication
D. Lipid metabolism
Correct Answer: B
Rationale:
• Clinical Clue: Microtubule dysfunction.
• Mechanism: Microtubules form spindle apparatus and
intracellular transport tracks.
• Why the Correct Answer Is Right: Essential for
chromosome separation and vesicle movement.
• Why the Other Options Are Wrong: A: Ribosomes handle
synthesis. C: DNA replication independent. D: Lipid
metabolism not microtubule-based.
• Exam Trap: Confusing cytoskeleton roles.
• High-Yield Clinical Correlation: Chemotherapy drugs target
microtubules (e.g., mitosis inhibition).
• Memory Anchor: “Microtubules = movement & mitosis.”
Q4. A patient with a defect in desmosomes presents with
skin blistering. The pathology most directly results from
impaired:
The Biologic Basis for Disease in Adults
and Children
9th Edition
Author(s)Julia Rogers
TEST BANK
Q1. A researcher compares two cell populations. One lacks
membrane-bound organelles and reproduces by binary
fission; the other contains a nucleus and divides via
mitosis. The difference in genetic organization most
directly explains which functional distinction?
, A. Ability to perform oxidative phosphorylation
B. Dependence on ribosomal RNA for protein synthesis
C. Spatial separation of transcription and translation
D. Use of DNA as genetic material
Correct Answer: C
Rationale:
• Clinical Clue: Comparison of prokaryotic vs eukaryotic
cells.
• Mechanism: Eukaryotes compartmentalize transcription
(nucleus) and translation (cytoplasm), unlike prokaryotes.
• Why the Correct Answer Is Right: Nuclear membrane
enables spatial separation of gene expression steps.
• Why the Other Options Are Wrong: A: Both can generate
ATP (though differently). B: Both use rRNA. D: Both use
DNA.
• Exam Trap: Assuming only eukaryotes synthesize proteins.
• High-Yield Clinical Correlation: Antibiotics target
prokaryotic ribosomes due to structural differences.
• Memory Anchor: “Nucleus = separation of transcription.”
Q2. A patient with mitochondrial DNA mutation develops
muscle weakness. The clinical manifestations are best
explained by impaired:
, A. Glycolysis in cytosol
B. ATP generation via oxidative phosphorylation
C. Protein synthesis in rough ER
D. Lipid synthesis in smooth ER
Correct Answer: B
Rationale:
• Clinical Clue: Mitochondrial DNA mutation + muscle
weakness.
• Mechanism: Mitochondria generate ATP through oxidative
phosphorylation.
• Why the Correct Answer Is Right: High-energy tissues
depend on mitochondrial ATP.
• Why the Other Options Are Wrong: A: Glycolysis occurs in
cytosol, not mitochondria. C/D: ER functions unaffected
primarily.
• Exam Trap: Confusing glycolysis with mitochondrial ATP
production.
• High-Yield Clinical Correlation: Mitochondrial diseases
affect muscles and neurons.
• Memory Anchor: “Mitochondria = powerhouses.”
Q3. A mutation disrupts microtubule assembly. Which
cellular process is most directly impaired?
, A. Protein synthesis
B. Vesicular transport and mitotic spindle formation
C. DNA replication
D. Lipid metabolism
Correct Answer: B
Rationale:
• Clinical Clue: Microtubule dysfunction.
• Mechanism: Microtubules form spindle apparatus and
intracellular transport tracks.
• Why the Correct Answer Is Right: Essential for
chromosome separation and vesicle movement.
• Why the Other Options Are Wrong: A: Ribosomes handle
synthesis. C: DNA replication independent. D: Lipid
metabolism not microtubule-based.
• Exam Trap: Confusing cytoskeleton roles.
• High-Yield Clinical Correlation: Chemotherapy drugs target
microtubules (e.g., mitosis inhibition).
• Memory Anchor: “Microtubules = movement & mitosis.”
Q4. A patient with a defect in desmosomes presents with
skin blistering. The pathology most directly results from
impaired:
