NR 507 Advanced Pathophysiology Week 8 Final Exam
Actual Exam 2026/2027 |100 Questions with Verified
Answers | 100% Correct | Pass Guaranteed
SECTION 1: Cellular & Genetic Foundations (15 Questions)
Q1: A patient with chronic alcohol use develops hepatomegaly. Liver biopsy reveals
enlarged hepatocytes with increased smooth endoplasmic reticulum. This cellular
adaptation is best described as:
A. Atrophy
B. Hypertrophy
C. Hyperplasia
D. Metaplasia
Correct Answer: C
Rationale: Pathophysiological Sequence: Chronic alcohol exposure (etiology) → induces
cytochrome P450 enzymes in hepatocytes (pathogenesis) → proliferation of smooth
endoplasmic reticulum to metabolize toxins (cellular adaptation) → hyperplasia
(increase in cell number) and organ enlargement.
Advanced Focus: This is compensatory hyperplasia, distinct from hypertrophy (increase
in cell size). In liver, both hyperplasia and hypertrophy can occur.
Clinical Correlation: Understanding this adaptation explains why chronic substance
users require higher drug doses (enzyme induction).
Distractor Analysis: Atrophy (A) would show decreased size. Hypertrophy (B) is increase
in cell size, not number. Metaplasia (D) is change from one cell type to another.
,Q2: Which genetic disorder demonstrates autosomal dominant inheritance with
complete penetrance?
A. Cystic fibrosis
B. Sickle cell disease
C. Huntington disease
D. Phenylketonuria (PKU)
Correct Answer: C
Rationale: Genetic Mechanism: Huntington disease is caused by a trinucleotide repeat
expansion on chromosome 4, inherited in an autosomal dominant pattern with
complete penetrance (if the gene is present, disease will manifest).
NP Application: Important for genetic counseling - each child of affected parent has
50% chance of inheritance.
Comparison: Cystic fibrosis (A) and PKU (D) are autosomal recessive. Sickle cell (B) is
autosomal recessive with incomplete dominance in trait form.
Q3: In apoptosis, which cellular component activates executioner caspases?
A. Cytochrome c from mitochondria
B. Cytochrome c from mitochondria
C. Lysosomal enzymes
D. Peroxisomal catalase
Correct Answer: A
,Rationale: Molecular Pathway: Intrinsic apoptosis pathway → mitochondrial release of
cytochrome c → forms apoptosome with Apaf-1 → activates executioner caspases
(caspase-3, -7).
Clinical Relevance: Understanding apoptosis helps distinguish programmed cell death
(apoptosis) from necrosis (uncontrolled cell death).
Distractor Analysis: Lysosomal enzymes (C) are involved in autophagy/necrosis.
Peroxisomal catalase (D) breaks down hydrogen peroxide.
Q4: A tumor suppressor gene mutation that removes cell cycle checkpoint control
would most likely affect:
A. TP53
B. RAS
C. MYC
D. BCR-ABL
Correct Answer: A
Rationale: TP53 encodes p53 protein, the "guardian of the genome," which halts cell
cycle at G1/S checkpoint in response to DNA damage. Loss of TP53 function removes
this checkpoint, allowing proliferation of damaged cells.
Comparison: RAS (B) and MYC (C) are proto-oncogenes that promote proliferation.
BCR-ABL (D) is a fusion oncogene in CML.
Q5: Which cellular change is characteristic of dysplasia?
A. Decreased nuclear-to-cytoplasmic ratio
B. Loss of cellular polarity and nuclear pleomorphism
C. Increased cytoplasmic basophilia
D. Nuclear pyknosis
Correct Answer: B
, Rationale: Dysplasia = disordered cellular growth with loss of polarity, nuclear
pleomorphism (variation in size/shape), and hyperchromasia.
Clinical Significance: Dysplasia is premalignant - may progress to carcinoma in situ.
Distinguishing Features: Unlike hyperplasia (ordered increase in cell number) or
metaplasia (change in cell type).
Q6: A patient with xeroderma pigmentosum has increased skin cancer risk due to
defective:
A. DNA nucleotide excision repair
B. DNA mismatch repair
C. Homologous recombination repair
D. Base excision repair
Correct Answer: A
Rationale: DNA Repair Mechanism: Xeroderma pigmentosum is caused by mutations in
nucleotide excision repair (NER) genes, which remove UV-induced pyrimidine dimers.
Defective NER leads to accumulation of DNA mutations and increased skin cancer risk.
Clinical Application: These patients must avoid sun exposure and undergo frequent skin
surveillance.
Q7: Which cellular process is primarily responsible for the elimination of autoreactive
lymphocytes in the thymus?
A. Apoptosis
B. Necrosis
C. Autophagy
D. Senescence
Correct Answer: A
Actual Exam 2026/2027 |100 Questions with Verified
Answers | 100% Correct | Pass Guaranteed
SECTION 1: Cellular & Genetic Foundations (15 Questions)
Q1: A patient with chronic alcohol use develops hepatomegaly. Liver biopsy reveals
enlarged hepatocytes with increased smooth endoplasmic reticulum. This cellular
adaptation is best described as:
A. Atrophy
B. Hypertrophy
C. Hyperplasia
D. Metaplasia
Correct Answer: C
Rationale: Pathophysiological Sequence: Chronic alcohol exposure (etiology) → induces
cytochrome P450 enzymes in hepatocytes (pathogenesis) → proliferation of smooth
endoplasmic reticulum to metabolize toxins (cellular adaptation) → hyperplasia
(increase in cell number) and organ enlargement.
Advanced Focus: This is compensatory hyperplasia, distinct from hypertrophy (increase
in cell size). In liver, both hyperplasia and hypertrophy can occur.
Clinical Correlation: Understanding this adaptation explains why chronic substance
users require higher drug doses (enzyme induction).
Distractor Analysis: Atrophy (A) would show decreased size. Hypertrophy (B) is increase
in cell size, not number. Metaplasia (D) is change from one cell type to another.
,Q2: Which genetic disorder demonstrates autosomal dominant inheritance with
complete penetrance?
A. Cystic fibrosis
B. Sickle cell disease
C. Huntington disease
D. Phenylketonuria (PKU)
Correct Answer: C
Rationale: Genetic Mechanism: Huntington disease is caused by a trinucleotide repeat
expansion on chromosome 4, inherited in an autosomal dominant pattern with
complete penetrance (if the gene is present, disease will manifest).
NP Application: Important for genetic counseling - each child of affected parent has
50% chance of inheritance.
Comparison: Cystic fibrosis (A) and PKU (D) are autosomal recessive. Sickle cell (B) is
autosomal recessive with incomplete dominance in trait form.
Q3: In apoptosis, which cellular component activates executioner caspases?
A. Cytochrome c from mitochondria
B. Cytochrome c from mitochondria
C. Lysosomal enzymes
D. Peroxisomal catalase
Correct Answer: A
,Rationale: Molecular Pathway: Intrinsic apoptosis pathway → mitochondrial release of
cytochrome c → forms apoptosome with Apaf-1 → activates executioner caspases
(caspase-3, -7).
Clinical Relevance: Understanding apoptosis helps distinguish programmed cell death
(apoptosis) from necrosis (uncontrolled cell death).
Distractor Analysis: Lysosomal enzymes (C) are involved in autophagy/necrosis.
Peroxisomal catalase (D) breaks down hydrogen peroxide.
Q4: A tumor suppressor gene mutation that removes cell cycle checkpoint control
would most likely affect:
A. TP53
B. RAS
C. MYC
D. BCR-ABL
Correct Answer: A
Rationale: TP53 encodes p53 protein, the "guardian of the genome," which halts cell
cycle at G1/S checkpoint in response to DNA damage. Loss of TP53 function removes
this checkpoint, allowing proliferation of damaged cells.
Comparison: RAS (B) and MYC (C) are proto-oncogenes that promote proliferation.
BCR-ABL (D) is a fusion oncogene in CML.
Q5: Which cellular change is characteristic of dysplasia?
A. Decreased nuclear-to-cytoplasmic ratio
B. Loss of cellular polarity and nuclear pleomorphism
C. Increased cytoplasmic basophilia
D. Nuclear pyknosis
Correct Answer: B
, Rationale: Dysplasia = disordered cellular growth with loss of polarity, nuclear
pleomorphism (variation in size/shape), and hyperchromasia.
Clinical Significance: Dysplasia is premalignant - may progress to carcinoma in situ.
Distinguishing Features: Unlike hyperplasia (ordered increase in cell number) or
metaplasia (change in cell type).
Q6: A patient with xeroderma pigmentosum has increased skin cancer risk due to
defective:
A. DNA nucleotide excision repair
B. DNA mismatch repair
C. Homologous recombination repair
D. Base excision repair
Correct Answer: A
Rationale: DNA Repair Mechanism: Xeroderma pigmentosum is caused by mutations in
nucleotide excision repair (NER) genes, which remove UV-induced pyrimidine dimers.
Defective NER leads to accumulation of DNA mutations and increased skin cancer risk.
Clinical Application: These patients must avoid sun exposure and undergo frequent skin
surveillance.
Q7: Which cellular process is primarily responsible for the elimination of autoreactive
lymphocytes in the thymus?
A. Apoptosis
B. Necrosis
C. Autophagy
D. Senescence
Correct Answer: A
