Pathology and Microbiology Practice Examination
Verified Questions, Correct Answers, and Detailed
Explanations for Science Students||Already Graded
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1. Which cellular adaptation results from increased workload and leads to
enlarged cell size?
A. Hypertrophy
Hypertrophy is an increase in cell size due to increased functional demand,
commonly seen in muscle tissue.
2. Reversible cell injury is most commonly associated with which change?
B. Cellular swelling
Cellular swelling occurs due to failure of the sodium-potassium pump during
early injury.
3. Which type of necrosis is typically seen in myocardial infarction?
C. Coagulative necrosis
Coagulative necrosis preserves tissue architecture and is characteristic of
ischemic injury in solid organs.
4. Liquefactive necrosis is most often associated with:
D. Brain infarctions
Enzymatic digestion of dead cells leads to liquid mass formation, typical in CNS
tissue.
5. Apoptosis differs from necrosis because apoptosis:
B. Is a programmed and energy-dependent process
Apoptosis is controlled cell death without inflammation.
,6. Which inflammatory cell predominates in acute inflammation?
A. Neutrophil
Neutrophils are the first responders in acute inflammatory reactions.
7. Chronic inflammation is characterized by:
C. Macrophages, lymphocytes, and plasma cells
Chronic inflammation involves mononuclear cells and tissue destruction.
8. Which mediator increases vascular permeability during inflammation?
B. Histamine
Histamine causes vasodilation and increased permeability in early
inflammation.
9. Granulomatous inflammation is most commonly associated with:
D. Tuberculosis
Tuberculosis produces caseating granulomas due to persistent immune
activation.
10. The process by which a tumor spreads to distant sites is called:
A. Metastasis
Metastasis involves dissemination of malignant cells via blood or lymphatics.
11. A benign tumor is best described as:
C. Well-differentiated and non-invasive
Benign tumors resemble normal tissue and do not invade surrounding
structures.
12. Which carcinogen directly damages DNA?
, B. Chemical carcinogens
Chemical carcinogens cause mutations by directly interacting with DNA.
13. Oncogenes are derived from:
A. Proto-oncogenes
Proto-oncogenes regulate normal cell growth and become oncogenes when
mutated.
14. Which tumor suppressor gene is commonly mutated in many cancers?
D. p53
p53 regulates the cell cycle and apoptosis; its loss permits uncontrolled growth.
15. Which microorganism lacks a cell wall?
C. Mycoplasma
Mycoplasma species lack peptidoglycan cell walls, making them resistant to
beta-lactam antibiotics.
16. Gram-positive bacteria are characterized by:
A. Thick peptidoglycan layer
This layer retains crystal violet stain during Gram staining.
17. Which bacterial structure is responsible for motility?
B. Flagella
Flagella enable bacterial movement.
18. Endotoxin is a component of:
D. Gram-negative bacterial cell walls
Endotoxin is lipopolysaccharide (LPS) found in the outer membrane.
Verified Questions, Correct Answers, and Detailed
Explanations for Science Students||Already Graded
A+
1. Which cellular adaptation results from increased workload and leads to
enlarged cell size?
A. Hypertrophy
Hypertrophy is an increase in cell size due to increased functional demand,
commonly seen in muscle tissue.
2. Reversible cell injury is most commonly associated with which change?
B. Cellular swelling
Cellular swelling occurs due to failure of the sodium-potassium pump during
early injury.
3. Which type of necrosis is typically seen in myocardial infarction?
C. Coagulative necrosis
Coagulative necrosis preserves tissue architecture and is characteristic of
ischemic injury in solid organs.
4. Liquefactive necrosis is most often associated with:
D. Brain infarctions
Enzymatic digestion of dead cells leads to liquid mass formation, typical in CNS
tissue.
5. Apoptosis differs from necrosis because apoptosis:
B. Is a programmed and energy-dependent process
Apoptosis is controlled cell death without inflammation.
,6. Which inflammatory cell predominates in acute inflammation?
A. Neutrophil
Neutrophils are the first responders in acute inflammatory reactions.
7. Chronic inflammation is characterized by:
C. Macrophages, lymphocytes, and plasma cells
Chronic inflammation involves mononuclear cells and tissue destruction.
8. Which mediator increases vascular permeability during inflammation?
B. Histamine
Histamine causes vasodilation and increased permeability in early
inflammation.
9. Granulomatous inflammation is most commonly associated with:
D. Tuberculosis
Tuberculosis produces caseating granulomas due to persistent immune
activation.
10. The process by which a tumor spreads to distant sites is called:
A. Metastasis
Metastasis involves dissemination of malignant cells via blood or lymphatics.
11. A benign tumor is best described as:
C. Well-differentiated and non-invasive
Benign tumors resemble normal tissue and do not invade surrounding
structures.
12. Which carcinogen directly damages DNA?
, B. Chemical carcinogens
Chemical carcinogens cause mutations by directly interacting with DNA.
13. Oncogenes are derived from:
A. Proto-oncogenes
Proto-oncogenes regulate normal cell growth and become oncogenes when
mutated.
14. Which tumor suppressor gene is commonly mutated in many cancers?
D. p53
p53 regulates the cell cycle and apoptosis; its loss permits uncontrolled growth.
15. Which microorganism lacks a cell wall?
C. Mycoplasma
Mycoplasma species lack peptidoglycan cell walls, making them resistant to
beta-lactam antibiotics.
16. Gram-positive bacteria are characterized by:
A. Thick peptidoglycan layer
This layer retains crystal violet stain during Gram staining.
17. Which bacterial structure is responsible for motility?
B. Flagella
Flagella enable bacterial movement.
18. Endotoxin is a component of:
D. Gram-negative bacterial cell walls
Endotoxin is lipopolysaccharide (LPS) found in the outer membrane.
