BIOS 242 Microbiology with Lab Exam
4 (Latest Update ) Anatomy
and Physiology IV with Lab | Questions
& Answers | 100% Correct | Grade A -
Chamberlain
1. Which bacteria cause nosocomial bloodstream infections via IV
lines?
A. Staphylococcus aureus
B. Staphylococcus epidermidis
C. Pseudomonas
D. All of the above
Correct Answer: D. All of the above
Rationale: Opportunistic pathogens colonize catheters forming
biofilms.
2. Which bacteria are Gram-positive cocci in chains?
A. Streptococcus
B. Staphylococcus
C. Enterococcus
D. Bacillus
,Correct Answer: A. Streptococcus
Rationale: Divide in one plane forming chains.
3. Which bacteria are Gram-positive cocci in clusters?
A. Staphylococcus
B. Streptococcus
C. Enterococcus
D. Bacillus
Correct Answer: A. Staphylococcus
Rationale: Divide in multiple planes forming clusters.
4. Which bacteria produce exotoxins?
A. Clostridium, Bacillus, Staphylococcus
B. Escherichia, Salmonella
C. Streptococcus, Lactobacillus
D. Mycobacterium only
Correct Answer: A. Clostridium, Bacillus, Staphylococcus
Rationale: Exotoxins are secreted proteins that cause disease.
5. Which bacteria produce endotoxins?
A. Gram-negative bacteria
B. Gram-positive bacteria
C. Mycobacterium
D. Bacillus
,Correct Answer: A. Gram-negative bacteria
Rationale: Lipid A component of LPS acts as endotoxin.
6. Which bacteria cause meningitis in young adults?
A. Neisseria meningitidis
B. Streptococcus pneumoniae
C. Haemophilus influenzae
D. All of the above
Correct Answer: D. All of the above
Rationale: These bacteria commonly cause meningitis depending on
age and risk factors.
7. Which bacteria cause neonatal meningitis?
A. Streptococcus agalactiae
B. Escherichia coli
C. Listeria monocytogenes
D. All of the above
Correct Answer: D. All of the above
Rationale: Neonates are susceptible to these pathogens through
vertical transmission or environment.
8. Which bacteria are acid-fast?
A. Mycobacterium
B. Bacillus
C. Staphylococcus
, D. Streptococcus
Correct Answer: A. Mycobacterium
Rationale: Mycolic acids in the cell wall retain carbol fuchsin dye.
9. Which bacteria cause tuberculosis?
A. Mycobacterium tuberculosis
B. Bacillus anthracis
C. Clostridium tetani
D. Staphylococcus aureus
Correct Answer: A. Mycobacterium tuberculosis
Rationale: Infects lungs and can disseminate systemically.
10. Which bacteria cause leprosy?
A. Mycobacterium leprae
B. Bacillus anthracis
C. Clostridium perfringens
D. Staphylococcus epidermidis
Correct Answer: A. Mycobacterium leprae
Rationale: Chronic infection of skin and peripheral nerves.
11. Which bacteria cause diphtheria?
A. Corynebacterium diphtheriae
B. Streptococcus pyogenes
C. Staphylococcus aureus
D. Bacillus cereus
4 (Latest Update ) Anatomy
and Physiology IV with Lab | Questions
& Answers | 100% Correct | Grade A -
Chamberlain
1. Which bacteria cause nosocomial bloodstream infections via IV
lines?
A. Staphylococcus aureus
B. Staphylococcus epidermidis
C. Pseudomonas
D. All of the above
Correct Answer: D. All of the above
Rationale: Opportunistic pathogens colonize catheters forming
biofilms.
2. Which bacteria are Gram-positive cocci in chains?
A. Streptococcus
B. Staphylococcus
C. Enterococcus
D. Bacillus
,Correct Answer: A. Streptococcus
Rationale: Divide in one plane forming chains.
3. Which bacteria are Gram-positive cocci in clusters?
A. Staphylococcus
B. Streptococcus
C. Enterococcus
D. Bacillus
Correct Answer: A. Staphylococcus
Rationale: Divide in multiple planes forming clusters.
4. Which bacteria produce exotoxins?
A. Clostridium, Bacillus, Staphylococcus
B. Escherichia, Salmonella
C. Streptococcus, Lactobacillus
D. Mycobacterium only
Correct Answer: A. Clostridium, Bacillus, Staphylococcus
Rationale: Exotoxins are secreted proteins that cause disease.
5. Which bacteria produce endotoxins?
A. Gram-negative bacteria
B. Gram-positive bacteria
C. Mycobacterium
D. Bacillus
,Correct Answer: A. Gram-negative bacteria
Rationale: Lipid A component of LPS acts as endotoxin.
6. Which bacteria cause meningitis in young adults?
A. Neisseria meningitidis
B. Streptococcus pneumoniae
C. Haemophilus influenzae
D. All of the above
Correct Answer: D. All of the above
Rationale: These bacteria commonly cause meningitis depending on
age and risk factors.
7. Which bacteria cause neonatal meningitis?
A. Streptococcus agalactiae
B. Escherichia coli
C. Listeria monocytogenes
D. All of the above
Correct Answer: D. All of the above
Rationale: Neonates are susceptible to these pathogens through
vertical transmission or environment.
8. Which bacteria are acid-fast?
A. Mycobacterium
B. Bacillus
C. Staphylococcus
, D. Streptococcus
Correct Answer: A. Mycobacterium
Rationale: Mycolic acids in the cell wall retain carbol fuchsin dye.
9. Which bacteria cause tuberculosis?
A. Mycobacterium tuberculosis
B. Bacillus anthracis
C. Clostridium tetani
D. Staphylococcus aureus
Correct Answer: A. Mycobacterium tuberculosis
Rationale: Infects lungs and can disseminate systemically.
10. Which bacteria cause leprosy?
A. Mycobacterium leprae
B. Bacillus anthracis
C. Clostridium perfringens
D. Staphylococcus epidermidis
Correct Answer: A. Mycobacterium leprae
Rationale: Chronic infection of skin and peripheral nerves.
11. Which bacteria cause diphtheria?
A. Corynebacterium diphtheriae
B. Streptococcus pyogenes
C. Staphylococcus aureus
D. Bacillus cereus
