,NURS 6521 Week 6 Quiz | Advanced Pharmacology (2026) Q&A |
Walden University
1. Which of the following best describes the primary mechanism of action of beta-lactam
antibiotics?
A) Inhibition of bacterial protein synthesis at the 30S ribosomal subunit
B) Disruption of bacterial cell wall synthesis by binding penicillin-binding proteins
C) Inhibition of bacterial DNA gyrase and topoisomerase IV
D) Blockade of folate synthesis in bacteria
Correct Answer: Disruption of bacterial cell wall synthesis by binding penicillin-binding
proteins
Rationale: Beta-lactam antibiotics, including penicillins and cephalosporins, bind to
penicillin-binding proteins and inhibit transpeptidation, preventing cross-linking of
peptidoglycan in the bacterial cell wall. This leads to cell lysis and death. Protein synthesis
inhibitors include aminoglycosides and macrolides, while fluoroquinolones inhibit DNA
gyrase.
2. A patient with a severe penicillin allergy requires treatment for a dental infection. Which
antibiotic is most appropriate?
A) Amoxicillin
B) Cephalexin
C) Clindamycin
D) Aztreonam
Correct Answer: Clindamycin
Rationale: Clindamycin is an appropriate alternative for patients with severe penicillin
allergy because it is not a beta-lactam antibiotic and has excellent activity against oral
,anaerobes and gram-positive cocci. Amoxicillin and cephalexin are beta-lactams with
potential cross-reactivity. Aztreonam is generally safe in penicillin allergy but is not first-line
for dental infections.
3. Which of the following is a common adverse effect of vancomycin infusion?
A) Nephrotoxicity
B) Ototoxicity
C) Infusion-related flushing known as red man syndrome
D) Hepatotoxicity
Correct Answer: Infusion-related flushing known as red man syndrome
Rationale: Red man syndrome is a histamine-mediated reaction characterized by flushing,
erythema, and pruritus of the face, neck, and upper torso during rapid vancomycin infusion. It
is managed by slowing the infusion rate and administering antihistamines. Nephrotoxicity
and ototoxicity are also concerns but are less common with modern dosing.
4. Which antibiotic class is associated with tendinopathy and tendon rupture?
A) Macrolides
B) Fluoroquinolones
C) Tetracyclines
D) Aminoglycosides
Correct Answer: Fluoroquinolones
Rationale: Fluoroquinolones, including ciprofloxacin and levofloxacin, are associated with
an increased risk of tendinitis and tendon rupture, particularly of the Achilles tendon. This
risk is highest in older adults, transplant recipients, and patients on corticosteroids.
Macrolides, tetracyclines, and aminoglycosides do not carry this risk.
, 5. A patient is prescribed metronidazole. Which of the following should the patient avoid?
A) Dairy products
B) Alcohol
C) Grapefruit juice
D) Leafy green vegetables
Correct Answer: Alcohol
Rationale: Metronidazole produces a disulfiram-like reaction when combined with alcohol,
causing severe nausea, vomiting, flushing, and tachycardia. Patients should avoid alcohol
during therapy and for at least 24 to 48 hours after completion. Dairy, grapefruit juice, and
leafy greens do not interact with metronidazole.
6. What is the primary mechanism of action of aminoglycosides?
A) Inhibition of protein synthesis by binding the 30S ribosomal subunit
B) Inhibition of cell wall synthesis
C) Inhibition of DNA replication
D) Disruption of the bacterial cell membrane
Correct Answer: Inhibition of protein synthesis by binding the 30S ribosomal subunit
Rationale: Aminoglycosides such as gentamicin and tobramycin bind irreversibly to the 30S
ribosomal subunit, causing misreading of mRNA and inhibition of protein synthesis. They are
bactericidal and require oxygen for uptake. They are not effective against anaerobes.
7. A patient receiving gentamicin should be monitored for which serious adverse effect?
A) Hepatotoxicity
B) Nephrotoxicity and ototoxicity
Walden University
1. Which of the following best describes the primary mechanism of action of beta-lactam
antibiotics?
A) Inhibition of bacterial protein synthesis at the 30S ribosomal subunit
B) Disruption of bacterial cell wall synthesis by binding penicillin-binding proteins
C) Inhibition of bacterial DNA gyrase and topoisomerase IV
D) Blockade of folate synthesis in bacteria
Correct Answer: Disruption of bacterial cell wall synthesis by binding penicillin-binding
proteins
Rationale: Beta-lactam antibiotics, including penicillins and cephalosporins, bind to
penicillin-binding proteins and inhibit transpeptidation, preventing cross-linking of
peptidoglycan in the bacterial cell wall. This leads to cell lysis and death. Protein synthesis
inhibitors include aminoglycosides and macrolides, while fluoroquinolones inhibit DNA
gyrase.
2. A patient with a severe penicillin allergy requires treatment for a dental infection. Which
antibiotic is most appropriate?
A) Amoxicillin
B) Cephalexin
C) Clindamycin
D) Aztreonam
Correct Answer: Clindamycin
Rationale: Clindamycin is an appropriate alternative for patients with severe penicillin
allergy because it is not a beta-lactam antibiotic and has excellent activity against oral
,anaerobes and gram-positive cocci. Amoxicillin and cephalexin are beta-lactams with
potential cross-reactivity. Aztreonam is generally safe in penicillin allergy but is not first-line
for dental infections.
3. Which of the following is a common adverse effect of vancomycin infusion?
A) Nephrotoxicity
B) Ototoxicity
C) Infusion-related flushing known as red man syndrome
D) Hepatotoxicity
Correct Answer: Infusion-related flushing known as red man syndrome
Rationale: Red man syndrome is a histamine-mediated reaction characterized by flushing,
erythema, and pruritus of the face, neck, and upper torso during rapid vancomycin infusion. It
is managed by slowing the infusion rate and administering antihistamines. Nephrotoxicity
and ototoxicity are also concerns but are less common with modern dosing.
4. Which antibiotic class is associated with tendinopathy and tendon rupture?
A) Macrolides
B) Fluoroquinolones
C) Tetracyclines
D) Aminoglycosides
Correct Answer: Fluoroquinolones
Rationale: Fluoroquinolones, including ciprofloxacin and levofloxacin, are associated with
an increased risk of tendinitis and tendon rupture, particularly of the Achilles tendon. This
risk is highest in older adults, transplant recipients, and patients on corticosteroids.
Macrolides, tetracyclines, and aminoglycosides do not carry this risk.
, 5. A patient is prescribed metronidazole. Which of the following should the patient avoid?
A) Dairy products
B) Alcohol
C) Grapefruit juice
D) Leafy green vegetables
Correct Answer: Alcohol
Rationale: Metronidazole produces a disulfiram-like reaction when combined with alcohol,
causing severe nausea, vomiting, flushing, and tachycardia. Patients should avoid alcohol
during therapy and for at least 24 to 48 hours after completion. Dairy, grapefruit juice, and
leafy greens do not interact with metronidazole.
6. What is the primary mechanism of action of aminoglycosides?
A) Inhibition of protein synthesis by binding the 30S ribosomal subunit
B) Inhibition of cell wall synthesis
C) Inhibition of DNA replication
D) Disruption of the bacterial cell membrane
Correct Answer: Inhibition of protein synthesis by binding the 30S ribosomal subunit
Rationale: Aminoglycosides such as gentamicin and tobramycin bind irreversibly to the 30S
ribosomal subunit, causing misreading of mRNA and inhibition of protein synthesis. They are
bactericidal and require oxygen for uptake. They are not effective against anaerobes.
7. A patient receiving gentamicin should be monitored for which serious adverse effect?
A) Hepatotoxicity
B) Nephrotoxicity and ototoxicity
