,BIO 202 Final Exam Microbiology Questions And Answers 2026/2027
Jersey College
Q1. Which feature of intact skin provides an important first-line
defense against microorganisms?
A) A physical barrier formed by tightly packed keratinized cells
B) Continuous production of antibodies by epidermal cells
C) Complete absence of microorganisms from the skin
D) High nutrient availability for pathogens
Correct Answer: A) A physical barrier formed by tightly packed keratinized
cells
Rationale: Intact keratinized epithelium creates a strong physical barrier
that limits microbial entry into underlying tissues.
Q2. Impetigo is most accurately described as a:
A) Viral infection of peripheral nerves
B) Superficial bacterial skin infection that commonly forms crusted lesions
C) Fungal infection limited to bone
D) Protozoal infection of skeletal muscle
Correct Answer: B) Superficial bacterial skin infection that commonly forms
crusted lesions
Rationale: Impetigo is a contagious superficial bacterial infection commonly
associated with characteristic superficial lesions and crusting.
Q3. Which organism is a major cause of skin abscesses and other
purulent soft-tissue infections?
A) Helicobacter pylori
B) Mycobacterium tuberculosis
C) Staphylococcus aureus
D) Vibrio cholerae
Correct Answer: C) Staphylococcus aureus
Rationale: Staphylococcus aureus commonly colonizes skin and can cause
boils, abscesses, cellulitis, and invasive soft-tissue infections.
Q4. Cellulitis differs from a superficial skin infection because
cellulitis primarily involves:
, A) The intestinal mucosa
B) The middle ear
C) The meninges
D) Deeper dermal and subcutaneous tissues
Correct Answer: D) Deeper dermal and subcutaneous tissues
Rationale: Cellulitis is a spreading bacterial infection involving deeper
layers of skin and subcutaneous tissue.
Q5. A wound containing devitalized tissue and exposed to
Clostridium perfringens is at risk for:
A) Gas gangrene
B) Influenza
C) Pertussis
D) Giardiasis
Correct Answer: A) Gas gangrene
Rationale: Clostridium perfringens can proliferate in poorly oxygenated
damaged tissue and produce toxins associated with myonecrosis and gas
formation.
Q6. Which infection involves bone tissue?
A) Dermatitis
B) Osteomyelitis
C) Conjunctivitis
D) Bronchitis
Correct Answer: B) Osteomyelitis
Rationale: Osteomyelitis is an infection of bone that may occur through
bloodstream spread, contiguous infection, or direct contamination.
Q7. A patient develops a painful, warm, swollen joint caused by
microorganisms within the joint space. This condition is most
consistent with:
A) Osteoporosis
B) Tendinitis
C) Septic arthritis
D) Myalgia
Correct Answer: C) Septic arthritis
Jersey College
Q1. Which feature of intact skin provides an important first-line
defense against microorganisms?
A) A physical barrier formed by tightly packed keratinized cells
B) Continuous production of antibodies by epidermal cells
C) Complete absence of microorganisms from the skin
D) High nutrient availability for pathogens
Correct Answer: A) A physical barrier formed by tightly packed keratinized
cells
Rationale: Intact keratinized epithelium creates a strong physical barrier
that limits microbial entry into underlying tissues.
Q2. Impetigo is most accurately described as a:
A) Viral infection of peripheral nerves
B) Superficial bacterial skin infection that commonly forms crusted lesions
C) Fungal infection limited to bone
D) Protozoal infection of skeletal muscle
Correct Answer: B) Superficial bacterial skin infection that commonly forms
crusted lesions
Rationale: Impetigo is a contagious superficial bacterial infection commonly
associated with characteristic superficial lesions and crusting.
Q3. Which organism is a major cause of skin abscesses and other
purulent soft-tissue infections?
A) Helicobacter pylori
B) Mycobacterium tuberculosis
C) Staphylococcus aureus
D) Vibrio cholerae
Correct Answer: C) Staphylococcus aureus
Rationale: Staphylococcus aureus commonly colonizes skin and can cause
boils, abscesses, cellulitis, and invasive soft-tissue infections.
Q4. Cellulitis differs from a superficial skin infection because
cellulitis primarily involves:
, A) The intestinal mucosa
B) The middle ear
C) The meninges
D) Deeper dermal and subcutaneous tissues
Correct Answer: D) Deeper dermal and subcutaneous tissues
Rationale: Cellulitis is a spreading bacterial infection involving deeper
layers of skin and subcutaneous tissue.
Q5. A wound containing devitalized tissue and exposed to
Clostridium perfringens is at risk for:
A) Gas gangrene
B) Influenza
C) Pertussis
D) Giardiasis
Correct Answer: A) Gas gangrene
Rationale: Clostridium perfringens can proliferate in poorly oxygenated
damaged tissue and produce toxins associated with myonecrosis and gas
formation.
Q6. Which infection involves bone tissue?
A) Dermatitis
B) Osteomyelitis
C) Conjunctivitis
D) Bronchitis
Correct Answer: B) Osteomyelitis
Rationale: Osteomyelitis is an infection of bone that may occur through
bloodstream spread, contiguous infection, or direct contamination.
Q7. A patient develops a painful, warm, swollen joint caused by
microorganisms within the joint space. This condition is most
consistent with:
A) Osteoporosis
B) Tendinitis
C) Septic arthritis
D) Myalgia
Correct Answer: C) Septic arthritis
