VERIFIED EXAM QUESTIONS AND RATIONALES |
EXPERT VERIFIED FOR GUARANTEED PASS
Clinical Chemistry
Question: What is the primary function of the enzyme amylase in the body?
a) Breakdown of proteins
b) Breakdown of carbohydrates
c) Breakdown of lipids
d) Breakdown of nucleic acids
Answer: b) Breakdown of carbohydrates
Rationale: Amylase is an enzyme that catalyzes the breakdown of carbohydrates,
particularly starches and glycogen, into sugars like glucose.
Hematology
,Question: A patient presents with low hemoglobin, microcytic hypochromic red
blood cells, and a low mean corpuscular volume (MCV). What is the most likely
diagnosis?
a) Vitamin B12 deficiency
b) Iron deficiency anemia
c) Sickle cell anemia
d) Polycythemia vera
Answer: b) Iron deficiency anemia
Rationale: Microcytic, hypochromic anemia with low MCV is most commonly
associated with iron deficiency, as iron is critical for hemoglobin production.
Microbiology
Question: Which of the following is the most common causative organism of
urinary tract infections (UTIs)?
a) Staphylococcus aureus
b) Escherichia coli
c) Streptococcus pneumoniae
,d) Pseudomonas aeruginosa
Answer: b) Escherichia coli
Rationale: E. coli is responsible for approximately 80-90% of urinary tract
infections due to its presence in the intestinal tract and ease of contamination of
the urinary system.
Immunology
Question: Which immunoglobulin is the first to be produced in response to a
primary immune response?
a) IgG
b) IgA
c) IgM
d) IgE
Answer: c) IgM
Rationale: IgM is the first antibody produced during the initial (primary) immune
response, and it is critical in neutralizing pathogens during the early stages of
infection.
Blood Banking
, Question: A patient with blood type O negative requires a transfusion. Which
blood type is the best match for this patient?
a) O positive
b) O negative
c) AB negative
d) A negative
Answer: b) O negative
Rationale: Blood type O negative is the universal donor for red blood cells,
meaning it can be given to patients of any Rh status and blood group.
Laboratory Operations and Quality Control
Question: Which of the following is the most important aspect of laboratory
quality control?
a) Ensuring all equipment is new
b) Performing regular calibration of instruments
c) Reducing test costs