ADVANCED PATHOPHYSIOLOGY EXAM 1 2025:
COMPREHENSIVE MULTIPLE CHOICE
EXAMINATION STUDY GUIDE
SECTION A: CELLULAR PATHOPHYSIOLOGY AND GENETICS
Questions 1-15
1. A 45-year-old patient with chronic alcohol abuse presents with hepatocyte injury
characterized by ballooning degeneration and Mallory bodies. Electron microscopy reveals
dilated rough endoplasmic reticulum and detached ribosomes. Which cellular adaptation
mechanism is primarily responsible for this presentation?
A. Apoptosis via intrinsic pathway
B. Autophagic cell death
C. Necrosis with karyolysis
D. Endoplasmic reticulum stress response
Answer: D
2. A researcher is studying a novel oncogene that produces a fusion protein with
constitutive tyrosine kinase activity. The fusion protein results from a balanced
translocation between chromosomes 9 and 22. Which molecular mechanism best
describes the activation of this oncogene?
,A. Point mutation in the RAS proto-oncogene
B. Gene amplification of MYC
C. Chromosomal translocation creating BCR-ABL fusion
D. Promoter hypomethylation of growth factor receptors
Answer: C
3. A 62-year-old female with breast cancer is found to have BRCA1 gene mutation. Her
tumor cells demonstrate defective DNA double-strand break repair via homologous
recombination. Which cellular process is most directly affected by this mutation?
A. Base excision repair during G1 phase
B. Nucleotide excision repair in transcriptionally active genes
C. Mismatch repair following DNA replication
D. Repair of DNA lesions via sister chromatid exchange
Answer: D
4. During a laboratory experiment, cells are exposed to hypoxia. Within minutes, there is
increased expression of genes involved in angiogenesis and glycolysis. Which transcription
factor is primarily responsible for this rapid adaptive response?
A. NF-κB
B. p53
C. HIF-1α
D. AP-1
,Answer: C
5. A patient with familial hypercholesterolemia has defective LDL receptor function. At the
cellular level, which process is most impaired in hepatocytes?
A. Receptor-mediated endocytosis from clathrin-coated pits
B. Phagocytosis of oxidized LDL particles
C. Pinocytosis of extracellular fluid containing LDL
D. Transcytosis of LDL across sinusoidal endothelial cells
Answer: A
6. A 58-year-old man with chronic hepatitis C develops hepatocellular carcinoma.
Molecular analysis of tumor tissue reveals silencing of the CDKN2A gene. This gene
normally functions to:
A. Activate cyclin-dependent kinases
B. Inhibit cyclin-dependent kinases
C. Promote DNA repair enzymes
D. Activate telomerase
Answer: B
7. A pharmaceutical company is developing a drug that inhibits the proteasome. Which
cellular process would be most directly affected by this drug?
, A. Translation of mRNA into protein
B. Degradation of ubiquitinated proteins
C. Glycosylation of newly synthesized proteins
D. Nuclear import of transcription factors
Answer: B
8. In a patient with Wilson's disease, copper accumulation leads to hepatocyte damage. At
the molecular level, this excess copper primarily causes cellular injury through:
A. Direct DNA intercalation
B. Fenton reaction generating hydroxyl radicals
C. Inhibition of mitochondrial ATP synthase
D. Activation of caspase-3
Answer: B
9. A 72-year-old with Parkinson's disease is found to have Lewy bodies in surviving
neurons. These inclusions are primarily composed of:
A. Beta-amyloid peptides
B. Phosphorylated tau protein
C. Alpha-synuclein aggregates
D. Polyglutamine repeats
Answer: C
COMPREHENSIVE MULTIPLE CHOICE
EXAMINATION STUDY GUIDE
SECTION A: CELLULAR PATHOPHYSIOLOGY AND GENETICS
Questions 1-15
1. A 45-year-old patient with chronic alcohol abuse presents with hepatocyte injury
characterized by ballooning degeneration and Mallory bodies. Electron microscopy reveals
dilated rough endoplasmic reticulum and detached ribosomes. Which cellular adaptation
mechanism is primarily responsible for this presentation?
A. Apoptosis via intrinsic pathway
B. Autophagic cell death
C. Necrosis with karyolysis
D. Endoplasmic reticulum stress response
Answer: D
2. A researcher is studying a novel oncogene that produces a fusion protein with
constitutive tyrosine kinase activity. The fusion protein results from a balanced
translocation between chromosomes 9 and 22. Which molecular mechanism best
describes the activation of this oncogene?
,A. Point mutation in the RAS proto-oncogene
B. Gene amplification of MYC
C. Chromosomal translocation creating BCR-ABL fusion
D. Promoter hypomethylation of growth factor receptors
Answer: C
3. A 62-year-old female with breast cancer is found to have BRCA1 gene mutation. Her
tumor cells demonstrate defective DNA double-strand break repair via homologous
recombination. Which cellular process is most directly affected by this mutation?
A. Base excision repair during G1 phase
B. Nucleotide excision repair in transcriptionally active genes
C. Mismatch repair following DNA replication
D. Repair of DNA lesions via sister chromatid exchange
Answer: D
4. During a laboratory experiment, cells are exposed to hypoxia. Within minutes, there is
increased expression of genes involved in angiogenesis and glycolysis. Which transcription
factor is primarily responsible for this rapid adaptive response?
A. NF-κB
B. p53
C. HIF-1α
D. AP-1
,Answer: C
5. A patient with familial hypercholesterolemia has defective LDL receptor function. At the
cellular level, which process is most impaired in hepatocytes?
A. Receptor-mediated endocytosis from clathrin-coated pits
B. Phagocytosis of oxidized LDL particles
C. Pinocytosis of extracellular fluid containing LDL
D. Transcytosis of LDL across sinusoidal endothelial cells
Answer: A
6. A 58-year-old man with chronic hepatitis C develops hepatocellular carcinoma.
Molecular analysis of tumor tissue reveals silencing of the CDKN2A gene. This gene
normally functions to:
A. Activate cyclin-dependent kinases
B. Inhibit cyclin-dependent kinases
C. Promote DNA repair enzymes
D. Activate telomerase
Answer: B
7. A pharmaceutical company is developing a drug that inhibits the proteasome. Which
cellular process would be most directly affected by this drug?
, A. Translation of mRNA into protein
B. Degradation of ubiquitinated proteins
C. Glycosylation of newly synthesized proteins
D. Nuclear import of transcription factors
Answer: B
8. In a patient with Wilson's disease, copper accumulation leads to hepatocyte damage. At
the molecular level, this excess copper primarily causes cellular injury through:
A. Direct DNA intercalation
B. Fenton reaction generating hydroxyl radicals
C. Inhibition of mitochondrial ATP synthase
D. Activation of caspase-3
Answer: B
9. A 72-year-old with Parkinson's disease is found to have Lewy bodies in surviving
neurons. These inclusions are primarily composed of:
A. Beta-amyloid peptides
B. Phosphorylated tau protein
C. Alpha-synuclein aggregates
D. Polyglutamine repeats
Answer: C
