COMSAE PHASE 2 FORM 104 QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) Q&A
2026 |INSTANT DOWNLOAD PDF
1. A 65-year-old man presents with chest pain radiating to the
left arm. Which enzyme is most specific for myocardial
infarction?
A. AST
B. LDH-1
C. Troponin I
D. CK-MB
Rationale: Troponin I is the most sensitive and specific marker
for myocardial injury and remains elevated longer than CK-MB.
Correct Answer: C. Troponin I
2. Which organism is the most common cause of community-
acquired pneumonia?
A. Klebsiella pneumoniae
B. Streptococcus pneumoniae
C. Mycoplasma pneumoniae
D. Legionella pneumophila
Rationale: Streptococcus pneumoniae remains the most
common cause of community-acquired pneumonia in adults.
Correct Answer: B. Streptococcus pneumoniae
,3. A patient has fatty acid oxidation defect. Which enzyme is
most likely deficient?
A. Carnitine palmitoyltransferase I
B. Hexokinase
C. Pyruvate dehydrogenase
D. Glucose-6-phosphatase
Rationale: CPT I is required for transport of long-chain fatty
acids into mitochondria for β-oxidation.
Correct Answer: A. Carnitine palmitoyltransferase I
4. Which vitamin deficiency causes Wernicke-Korsakoff
syndrome?
A. Vitamin B1 (Thiamine)
B. Vitamin B6
C. Vitamin B12
D. Vitamin C
Rationale: Thiamine deficiency leads to Wernicke
encephalopathy and Korsakoff psychosis.
Correct Answer: A. Vitamin B1 (Thiamine)
5. Which hormone increases calcium reabsorption in the
kidney?
,A. Calcitonin
B. Parathyroid hormone
C. Aldosterone
D. ADH
Rationale: PTH increases calcium reabsorption in distal renal
tubules.
Correct Answer: B. Parathyroid hormone
6. Which cell type produces antibodies?
A. T helper cells
B. Plasma cells
C. Macrophages
D. Neutrophils
Rationale: Plasma cells are differentiated B cells that secrete
antibodies.
Correct Answer: B. Plasma cells
7. Which pathogen is associated with “rice-water stools”?
A. Shigella dysenteriae
B. Vibrio cholerae
C. Salmonella typhi
D. E. coli O157:H7
, Rationale: Vibrio cholerae causes profuse watery diarrhea
described as rice-water stools.
Correct Answer: B. Vibrio cholerae
8. Which artery is most commonly involved in myocardial
infarction?
A. Left circumflex artery
B. Right coronary artery
C. Left anterior descending artery
D. Posterior descending artery
Rationale: LAD artery occlusion causes anterior wall MI and is
most common.
Correct Answer: C. Left anterior descending artery
9. Which electrolyte imbalance causes peaked T waves on
ECG?
A. Hypokalemia
B. Hyperkalemia
C. Hypercalcemia
D. Hypocalcemia
Rationale: Hyperkalemia causes peaked T waves due to altered
cardiac conduction.
Correct Answer: B. Hyperkalemia
CORRECT ANSWERS (VERIFIED ANSWERS) Q&A
2026 |INSTANT DOWNLOAD PDF
1. A 65-year-old man presents with chest pain radiating to the
left arm. Which enzyme is most specific for myocardial
infarction?
A. AST
B. LDH-1
C. Troponin I
D. CK-MB
Rationale: Troponin I is the most sensitive and specific marker
for myocardial injury and remains elevated longer than CK-MB.
Correct Answer: C. Troponin I
2. Which organism is the most common cause of community-
acquired pneumonia?
A. Klebsiella pneumoniae
B. Streptococcus pneumoniae
C. Mycoplasma pneumoniae
D. Legionella pneumophila
Rationale: Streptococcus pneumoniae remains the most
common cause of community-acquired pneumonia in adults.
Correct Answer: B. Streptococcus pneumoniae
,3. A patient has fatty acid oxidation defect. Which enzyme is
most likely deficient?
A. Carnitine palmitoyltransferase I
B. Hexokinase
C. Pyruvate dehydrogenase
D. Glucose-6-phosphatase
Rationale: CPT I is required for transport of long-chain fatty
acids into mitochondria for β-oxidation.
Correct Answer: A. Carnitine palmitoyltransferase I
4. Which vitamin deficiency causes Wernicke-Korsakoff
syndrome?
A. Vitamin B1 (Thiamine)
B. Vitamin B6
C. Vitamin B12
D. Vitamin C
Rationale: Thiamine deficiency leads to Wernicke
encephalopathy and Korsakoff psychosis.
Correct Answer: A. Vitamin B1 (Thiamine)
5. Which hormone increases calcium reabsorption in the
kidney?
,A. Calcitonin
B. Parathyroid hormone
C. Aldosterone
D. ADH
Rationale: PTH increases calcium reabsorption in distal renal
tubules.
Correct Answer: B. Parathyroid hormone
6. Which cell type produces antibodies?
A. T helper cells
B. Plasma cells
C. Macrophages
D. Neutrophils
Rationale: Plasma cells are differentiated B cells that secrete
antibodies.
Correct Answer: B. Plasma cells
7. Which pathogen is associated with “rice-water stools”?
A. Shigella dysenteriae
B. Vibrio cholerae
C. Salmonella typhi
D. E. coli O157:H7
, Rationale: Vibrio cholerae causes profuse watery diarrhea
described as rice-water stools.
Correct Answer: B. Vibrio cholerae
8. Which artery is most commonly involved in myocardial
infarction?
A. Left circumflex artery
B. Right coronary artery
C. Left anterior descending artery
D. Posterior descending artery
Rationale: LAD artery occlusion causes anterior wall MI and is
most common.
Correct Answer: C. Left anterior descending artery
9. Which electrolyte imbalance causes peaked T waves on
ECG?
A. Hypokalemia
B. Hyperkalemia
C. Hypercalcemia
D. Hypocalcemia
Rationale: Hyperkalemia causes peaked T waves due to altered
cardiac conduction.
Correct Answer: B. Hyperkalemia
