COMSAE PHASE 1 FORM 104 TEST QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) Q&A
2026 |INSTANT DOWNLOAD PDF
1. A 23-year-old presents with fatigue and pallor. Lab shows
microcytic hypochromic anemia. Which is the most likely
cause?
A. Vitamin B12 deficiency
B. Iron deficiency
C. Aplastic anemia
D. Hemolytic anemia
Rationale: Microcytic hypochromic anemia is classically caused
by iron deficiency due to chronic blood loss or poor intake.
Correct answer: B. Iron deficiency
2. Which vitamin deficiency causes night blindness?
A. Vitamin A
B. Vitamin D
C. Vitamin C
D. Vitamin K
Rationale: Vitamin A is required for rhodopsin formation in
retinal rods.
Correct answer: A. Vitamin A
,3. A patient has muscle weakness and decreased deep tendon
reflexes. Low potassium is found. What is the most likely
cause?
A. Hyperkalemia
B. Hypokalemia
C. Hypernatremia
D. Hypocalcemia
Rationale: Hypokalemia causes muscle weakness and
hyporeflexia due to impaired membrane excitability.
Correct answer: B. Hypokalemia
4. Which organelle is responsible for ATP production?
A. Nucleus
B. Ribosome
C. Mitochondria
D. Golgi apparatus
Rationale: Mitochondria generate ATP through oxidative
phosphorylation.
Correct answer: C. Mitochondria
5. Which immune cells produce antibodies?
A. T cells
B. B cells
,C. Macrophages
D. Neutrophils
Rationale: B lymphocytes differentiate into plasma cells that
secrete antibodies.
Correct answer: B. B cells
6. A patient with peptic ulcers is found to have Helicobacter
pylori infection. Which enzyme allows it to survive stomach
acid?
A. Amylase
B. Urease
C. Protease
D. Lipase
Rationale: Urease breaks down urea into ammonia, neutralizing
acid locally.
Correct answer: B. Urease
7. What is the primary neurotransmitter at the neuromuscular
junction?
A. Dopamine
B. Acetylcholine
C. Serotonin
D. GABA
, Rationale: Acetylcholine activates nicotinic receptors at NMJ.
Correct answer: B. Acetylcholine
8. Which structure connects muscle to bone?
A. Ligament
B. Tendon
C. Cartilage
D. Fascia
Rationale: Tendons attach muscle to bone, ligaments connect
bone to bone.
Correct answer: B. Tendon
9. Which blood vessel carries oxygenated blood away from
the heart?
A. Veins
B. Arteries
C. Capillaries
D. Venules
Rationale: Arteries carry blood away from the heart under high
pressure.
Correct answer: B. Arteries
10. Which electrolyte is most important for bone formation?
CORRECT ANSWERS (VERIFIED ANSWERS) Q&A
2026 |INSTANT DOWNLOAD PDF
1. A 23-year-old presents with fatigue and pallor. Lab shows
microcytic hypochromic anemia. Which is the most likely
cause?
A. Vitamin B12 deficiency
B. Iron deficiency
C. Aplastic anemia
D. Hemolytic anemia
Rationale: Microcytic hypochromic anemia is classically caused
by iron deficiency due to chronic blood loss or poor intake.
Correct answer: B. Iron deficiency
2. Which vitamin deficiency causes night blindness?
A. Vitamin A
B. Vitamin D
C. Vitamin C
D. Vitamin K
Rationale: Vitamin A is required for rhodopsin formation in
retinal rods.
Correct answer: A. Vitamin A
,3. A patient has muscle weakness and decreased deep tendon
reflexes. Low potassium is found. What is the most likely
cause?
A. Hyperkalemia
B. Hypokalemia
C. Hypernatremia
D. Hypocalcemia
Rationale: Hypokalemia causes muscle weakness and
hyporeflexia due to impaired membrane excitability.
Correct answer: B. Hypokalemia
4. Which organelle is responsible for ATP production?
A. Nucleus
B. Ribosome
C. Mitochondria
D. Golgi apparatus
Rationale: Mitochondria generate ATP through oxidative
phosphorylation.
Correct answer: C. Mitochondria
5. Which immune cells produce antibodies?
A. T cells
B. B cells
,C. Macrophages
D. Neutrophils
Rationale: B lymphocytes differentiate into plasma cells that
secrete antibodies.
Correct answer: B. B cells
6. A patient with peptic ulcers is found to have Helicobacter
pylori infection. Which enzyme allows it to survive stomach
acid?
A. Amylase
B. Urease
C. Protease
D. Lipase
Rationale: Urease breaks down urea into ammonia, neutralizing
acid locally.
Correct answer: B. Urease
7. What is the primary neurotransmitter at the neuromuscular
junction?
A. Dopamine
B. Acetylcholine
C. Serotonin
D. GABA
, Rationale: Acetylcholine activates nicotinic receptors at NMJ.
Correct answer: B. Acetylcholine
8. Which structure connects muscle to bone?
A. Ligament
B. Tendon
C. Cartilage
D. Fascia
Rationale: Tendons attach muscle to bone, ligaments connect
bone to bone.
Correct answer: B. Tendon
9. Which blood vessel carries oxygenated blood away from
the heart?
A. Veins
B. Arteries
C. Capillaries
D. Venules
Rationale: Arteries carry blood away from the heart under high
pressure.
Correct answer: B. Arteries
10. Which electrolyte is most important for bone formation?
