BIOS 24263778 Microbiology Variant
Exam 4 (Latest Update )
Anatomy and Physiology IV with Lab |
Questions & Answers | 100% Correct |
Grade A – Chamberlain
1. Which bacterial genus is responsible for tuberculosis?
A. Mycobacterium
B. Streptococcus
C. Staphylococcus
D. Bacillus
Correct Answer: A
Rationale: Mycobacterium tuberculosis is an acid-fast bacillus that
causes tuberculosis.
2. Which bacteria are Gram-negative cocci that can cause
meningitis?
A. Neisseria
B. Streptococcus
C. Staphylococcus
D. Bacillus
,Correct Answer: A
Rationale: Neisseria meningitidis is a Gram-negative diplococcus
responsible for meningococcal meningitis.
3. Which bacterial structure allows adherence to host tissues?
A. Pili
B. Capsule
C. Flagella
D. Endospore
Correct Answer: A
Rationale: Pili or fimbriae mediate adhesion to host cells and
surfaces.
4. Which bacterial genus produces botulinum toxin?
A. Clostridium
B. Bacillus
C. Listeria
D. Salmonella
Correct Answer: A
Rationale: Clostridium botulinum produces a neurotoxin causing
flaccid paralysis.
5. Which microbial growth phase shows rapid exponential
growth?
A. Lag phase
B. Log phase
,C. Stationary phase
D. Death phase
Correct Answer: B
Rationale: Log phase is characterized by maximum cell division and
exponential growth.
6. Which viral genome is RNA-based and segmented?
A. Influenza virus
B. Adenovirus
C. Herpesvirus
D. Papillomavirus
Correct Answer: A
Rationale: Influenza virus has a segmented, negative-sense RNA
genome.
7. Which bacterial genus produces tetanus toxin?
A. Clostridium
B. Bacillus
C. Listeria
D. Salmonella
Correct Answer: A
Rationale: Clostridium tetani produces tetanospasmin, causing
spastic paralysis.
, 8. Which fungal genus causes systemic infection in
immunocompromised patients?
A. Aspergillus
B. Candida
C. Trichophyton
D. Histoplasma
Correct Answer: A
Rationale: Aspergillus fumigatus can invade tissues in
immunocompromised individuals.
9. Which bacterial enzyme converts fibrinogen to fibrin?
A. Coagulase
B. Catalase
C. Urease
D. Oxidase
Correct Answer: A
Rationale: Coagulase promotes clot formation, helping bacteria
evade host defenses.
10. Which microbial method sterilizes liquids sensitive to heat?
A. Filtration
B. Autoclaving
C. Boiling
D. Dry heat
Exam 4 (Latest Update )
Anatomy and Physiology IV with Lab |
Questions & Answers | 100% Correct |
Grade A – Chamberlain
1. Which bacterial genus is responsible for tuberculosis?
A. Mycobacterium
B. Streptococcus
C. Staphylococcus
D. Bacillus
Correct Answer: A
Rationale: Mycobacterium tuberculosis is an acid-fast bacillus that
causes tuberculosis.
2. Which bacteria are Gram-negative cocci that can cause
meningitis?
A. Neisseria
B. Streptococcus
C. Staphylococcus
D. Bacillus
,Correct Answer: A
Rationale: Neisseria meningitidis is a Gram-negative diplococcus
responsible for meningococcal meningitis.
3. Which bacterial structure allows adherence to host tissues?
A. Pili
B. Capsule
C. Flagella
D. Endospore
Correct Answer: A
Rationale: Pili or fimbriae mediate adhesion to host cells and
surfaces.
4. Which bacterial genus produces botulinum toxin?
A. Clostridium
B. Bacillus
C. Listeria
D. Salmonella
Correct Answer: A
Rationale: Clostridium botulinum produces a neurotoxin causing
flaccid paralysis.
5. Which microbial growth phase shows rapid exponential
growth?
A. Lag phase
B. Log phase
,C. Stationary phase
D. Death phase
Correct Answer: B
Rationale: Log phase is characterized by maximum cell division and
exponential growth.
6. Which viral genome is RNA-based and segmented?
A. Influenza virus
B. Adenovirus
C. Herpesvirus
D. Papillomavirus
Correct Answer: A
Rationale: Influenza virus has a segmented, negative-sense RNA
genome.
7. Which bacterial genus produces tetanus toxin?
A. Clostridium
B. Bacillus
C. Listeria
D. Salmonella
Correct Answer: A
Rationale: Clostridium tetani produces tetanospasmin, causing
spastic paralysis.
, 8. Which fungal genus causes systemic infection in
immunocompromised patients?
A. Aspergillus
B. Candida
C. Trichophyton
D. Histoplasma
Correct Answer: A
Rationale: Aspergillus fumigatus can invade tissues in
immunocompromised individuals.
9. Which bacterial enzyme converts fibrinogen to fibrin?
A. Coagulase
B. Catalase
C. Urease
D. Oxidase
Correct Answer: A
Rationale: Coagulase promotes clot formation, helping bacteria
evade host defenses.
10. Which microbial method sterilizes liquids sensitive to heat?
A. Filtration
B. Autoclaving
C. Boiling
D. Dry heat
