NR 507: Advanced Pathophysiology
Midterm Practice Examination
Chamberlain University | 2026
150 Questions with Answers & Expert
Rationales
Instructions
• This practice exam covers advanced pathophysiology concepts for the midterm
examination.
• Select the single best answer for each question.
• Rationales explain the underlying pathophysiology and clinical correlations.
,Section 1: Cellular Biology and Genetics (Questions 1-25)
1. A 55-year-old male with chronic hepatitis C develops hepatocellular
carcinoma. Which of the following best describes the role of chronic
inflammation in carcinogenesis?
A. Inflammation directly mutates tumor suppressor genes
B. Inflammatory cytokines promote cellular proliferation and angiogenesis while
inhibiting apoptosis
C. Inflammation suppresses the immune system's ability to detect cancer cells
D. Inflammation causes telomere shortening leading to genomic instability
Answer: B
Expert Rationale: Chronic inflammation creates a microenvironment rich in
cytokines (IL-6, TNF-α), growth factors, and reactive oxygen species that promote
cellular proliferation, inhibit apoptosis, and stimulate angiogenesis, contributing to
malignant transformation.
2. A 45-year-old female is diagnosed with non-small cell lung cancer. Genetic
analysis reveals a mutation in the p53 tumor suppressor gene. Which of the
following best describes the role of p53 in normal cellular function?
A. Promotes cell division through growth factor signaling
B. Initiates apoptosis and cell cycle arrest in response to DNA damage
C. Activates telomerase to prevent cellular senescence
D. Inhibits angiogenesis to prevent tumor growth
Answer: B
Expert Rationale: The p53 tumor suppressor gene, known as the "guardian of the
genome," responds to DNA damage by inducing cell cycle arrest (allowing DNA
repair) or initiating apoptosis if damage is irreparable. Loss of p53 function allows
damaged cells to proliferate.
3. A 30-year-old female with a family history of breast cancer undergoes
genetic testing and is found to have a BRCA1 mutation. Which of the following
best describes the function of BRCA1 in normal cells?
A. Promotes cell cycle progression through the G1/S checkpoint
B. Facilitates DNA double-strand break repair via homologous recombination
C. Prevents angiogenesis by inhibiting vascular endothelial growth factor
D. Activates telomerase to maintain chromosomal integrity
,Answer: B
Expert Rationale: BRCA1 and BRCA2 are tumor suppressor genes involved in
DNA double-strand break repair through homologous recombination. Mutations
impair DNA repair, leading to genomic instability and increased cancer risk.
4. A 62-year-old male is diagnosed with multiple myeloma. Which of the
following laboratory findings is most characteristic of this condition?
A. Elevated serum ferritin
B. Monoclonal spike on serum protein electrophoresis
C. Decreased serum calcium
D. Positive direct Coombs test
Answer: B
Expert Rationale: Multiple myeloma is characterized by malignant plasma cell
proliferation producing a monoclonal immunoglobulin (M protein), which appears as
a monoclonal spike (M spike) on serum protein electrophoresis.
5. A 28-year-old female with systemic lupus erythematosus (SLE) has a positive
antinuclear antibody (ANA) test. Which type of hypersensitivity reaction is
primarily responsible for SLE?
A. Type I (IgE-mediated)
B. Type II (antibody-mediated cytotoxic)
C. Type III (immune complex-mediated)
D. Type IV (cell-mediated)
Answer: C
Expert Rationale: SLE is a Type III hypersensitivity reaction characterized by the
formation of immune complexes (autoantibodies bound to self-antigens) that
deposit in small vessels, kidneys, and joints, leading to complement activation and
inflammation.
6. A 6-year-old boy with severe combined immunodeficiency (SCID) presents
with recurrent, life-threatening infections. Which of the following
pathophysiologic mechanisms underlies SCID?
A. Impaired B cell function with normal T cells
B. Deficiency of both T cells and B cells due to defective lymphoid development
C. Isolated IgA deficiency with normal IgG and IgM
D. Complement C3 deficiency leading to opsonization defects
Answer: B
Expert Rationale: SCID is characterized by severe defects in both T cell and B cell
development, often due to mutations in genes involved in lymphocyte maturation
(e.g., adenosine deaminase deficiency), resulting in profound immunodeficiency.
, 7. A 72-year-old female is diagnosed with anemia of chronic disease. Which of
the following best describes the pathophysiology of this condition?
A. Decreased erythropoietin production due to renal failure
B. Impaired iron utilization due to hepcidin upregulation
C. Vitamin B12 deficiency due to malabsorption
D. Hemolysis due to autoantibody formation
Answer: B
Expert Rationale: Anemia of chronic disease is mediated by hepcidin, an acute-
phase protein upregulated in inflammatory states. Hepcidin blocks iron export from
macrophages and enterocytes, leading to functional iron deficiency despite adequate
iron stores.
8. A 35-year-old male with a history of recurrent bacterial infections is found to
have a deficiency in the membrane attack complex (MAC) of complement.
Which complement component is most directly responsible for MAC formation?
A. C1q
B. C3a
C. C5b
D. C9
Answer: C
Expert Rationale: The membrane attack complex (MAC) is formed by the
assembly of complement components C5b, C6, C7, C8, and multiple C9 molecules.
C5b initiates the complex formation that creates pores in bacterial cell membranes,
leading to lysis.
9. A 42-year-old female with Hashimoto's thyroiditis presents with fatigue,
weight gain, and cold intolerance. Which of the following best describes the
pathogenesis of Hashimoto's thyroiditis?
A. Autoimmune destruction of thyroid tissue by T cells and autoantibodies
B. Thyroid-stimulating immunoglobulin (TSI) binding to TSH receptors
C. Viral infection causing transient thyroid inflammation
D. Iodine deficiency leading to compensatory goiter
Answer: A
Expert Rationale: Hashimoto's thyroiditis is an autoimmune disorder
characterized by T cell-mediated destruction of thyroid follicles and autoantibodies
(anti-thyroperoxidase, anti-thyroglobulin), leading to progressive hypothyroidism.
10. A 28-year-old male is diagnosed with ankylosing spondylitis. Which genetic
marker is most strongly associated with this condition?
A. HLA-DR4
B. HLA-B27
Midterm Practice Examination
Chamberlain University | 2026
150 Questions with Answers & Expert
Rationales
Instructions
• This practice exam covers advanced pathophysiology concepts for the midterm
examination.
• Select the single best answer for each question.
• Rationales explain the underlying pathophysiology and clinical correlations.
,Section 1: Cellular Biology and Genetics (Questions 1-25)
1. A 55-year-old male with chronic hepatitis C develops hepatocellular
carcinoma. Which of the following best describes the role of chronic
inflammation in carcinogenesis?
A. Inflammation directly mutates tumor suppressor genes
B. Inflammatory cytokines promote cellular proliferation and angiogenesis while
inhibiting apoptosis
C. Inflammation suppresses the immune system's ability to detect cancer cells
D. Inflammation causes telomere shortening leading to genomic instability
Answer: B
Expert Rationale: Chronic inflammation creates a microenvironment rich in
cytokines (IL-6, TNF-α), growth factors, and reactive oxygen species that promote
cellular proliferation, inhibit apoptosis, and stimulate angiogenesis, contributing to
malignant transformation.
2. A 45-year-old female is diagnosed with non-small cell lung cancer. Genetic
analysis reveals a mutation in the p53 tumor suppressor gene. Which of the
following best describes the role of p53 in normal cellular function?
A. Promotes cell division through growth factor signaling
B. Initiates apoptosis and cell cycle arrest in response to DNA damage
C. Activates telomerase to prevent cellular senescence
D. Inhibits angiogenesis to prevent tumor growth
Answer: B
Expert Rationale: The p53 tumor suppressor gene, known as the "guardian of the
genome," responds to DNA damage by inducing cell cycle arrest (allowing DNA
repair) or initiating apoptosis if damage is irreparable. Loss of p53 function allows
damaged cells to proliferate.
3. A 30-year-old female with a family history of breast cancer undergoes
genetic testing and is found to have a BRCA1 mutation. Which of the following
best describes the function of BRCA1 in normal cells?
A. Promotes cell cycle progression through the G1/S checkpoint
B. Facilitates DNA double-strand break repair via homologous recombination
C. Prevents angiogenesis by inhibiting vascular endothelial growth factor
D. Activates telomerase to maintain chromosomal integrity
,Answer: B
Expert Rationale: BRCA1 and BRCA2 are tumor suppressor genes involved in
DNA double-strand break repair through homologous recombination. Mutations
impair DNA repair, leading to genomic instability and increased cancer risk.
4. A 62-year-old male is diagnosed with multiple myeloma. Which of the
following laboratory findings is most characteristic of this condition?
A. Elevated serum ferritin
B. Monoclonal spike on serum protein electrophoresis
C. Decreased serum calcium
D. Positive direct Coombs test
Answer: B
Expert Rationale: Multiple myeloma is characterized by malignant plasma cell
proliferation producing a monoclonal immunoglobulin (M protein), which appears as
a monoclonal spike (M spike) on serum protein electrophoresis.
5. A 28-year-old female with systemic lupus erythematosus (SLE) has a positive
antinuclear antibody (ANA) test. Which type of hypersensitivity reaction is
primarily responsible for SLE?
A. Type I (IgE-mediated)
B. Type II (antibody-mediated cytotoxic)
C. Type III (immune complex-mediated)
D. Type IV (cell-mediated)
Answer: C
Expert Rationale: SLE is a Type III hypersensitivity reaction characterized by the
formation of immune complexes (autoantibodies bound to self-antigens) that
deposit in small vessels, kidneys, and joints, leading to complement activation and
inflammation.
6. A 6-year-old boy with severe combined immunodeficiency (SCID) presents
with recurrent, life-threatening infections. Which of the following
pathophysiologic mechanisms underlies SCID?
A. Impaired B cell function with normal T cells
B. Deficiency of both T cells and B cells due to defective lymphoid development
C. Isolated IgA deficiency with normal IgG and IgM
D. Complement C3 deficiency leading to opsonization defects
Answer: B
Expert Rationale: SCID is characterized by severe defects in both T cell and B cell
development, often due to mutations in genes involved in lymphocyte maturation
(e.g., adenosine deaminase deficiency), resulting in profound immunodeficiency.
, 7. A 72-year-old female is diagnosed with anemia of chronic disease. Which of
the following best describes the pathophysiology of this condition?
A. Decreased erythropoietin production due to renal failure
B. Impaired iron utilization due to hepcidin upregulation
C. Vitamin B12 deficiency due to malabsorption
D. Hemolysis due to autoantibody formation
Answer: B
Expert Rationale: Anemia of chronic disease is mediated by hepcidin, an acute-
phase protein upregulated in inflammatory states. Hepcidin blocks iron export from
macrophages and enterocytes, leading to functional iron deficiency despite adequate
iron stores.
8. A 35-year-old male with a history of recurrent bacterial infections is found to
have a deficiency in the membrane attack complex (MAC) of complement.
Which complement component is most directly responsible for MAC formation?
A. C1q
B. C3a
C. C5b
D. C9
Answer: C
Expert Rationale: The membrane attack complex (MAC) is formed by the
assembly of complement components C5b, C6, C7, C8, and multiple C9 molecules.
C5b initiates the complex formation that creates pores in bacterial cell membranes,
leading to lysis.
9. A 42-year-old female with Hashimoto's thyroiditis presents with fatigue,
weight gain, and cold intolerance. Which of the following best describes the
pathogenesis of Hashimoto's thyroiditis?
A. Autoimmune destruction of thyroid tissue by T cells and autoantibodies
B. Thyroid-stimulating immunoglobulin (TSI) binding to TSH receptors
C. Viral infection causing transient thyroid inflammation
D. Iodine deficiency leading to compensatory goiter
Answer: A
Expert Rationale: Hashimoto's thyroiditis is an autoimmune disorder
characterized by T cell-mediated destruction of thyroid follicles and autoantibodies
(anti-thyroperoxidase, anti-thyroglobulin), leading to progressive hypothyroidism.
10. A 28-year-old male is diagnosed with ankylosing spondylitis. Which genetic
marker is most strongly associated with this condition?
A. HLA-DR4
B. HLA-B27
