NURS 5334 Antimicrobial Recall Quiz | Latest Update
2026/2027 | 200 Practice Questions and Verified Answers |
UTA Advanced Pharmacology | A+ Graded
1. Which of the following best explains the mechanism of action of betalactam antibiotics?
A) Inhibit bacterial folic acid synthesis
B) Inhibit protein synthesis at the 30S ribosomal subunit
C) Inhibit transpeptidation involved in bacterial cell wall synthesis
D) Disrupt DNA gyrase and topoisomerase IV function
Answer: C) Inhibit transpeptidation involved in bacterial cell wall synthesis
Explanation: Betalactam antibiotics (penicillins, cephalosporins, carbapenems, monobactams) inhibit
transpeptidase enzymes (penicillinbinding proteins, PBPs) that crosslink peptidoglycan chains in the
bacterial cell wall, leading to cell lysis.
2. Which cephalosporin generation would be most appropriate for treating a hospitalized patient with
suspected Pseudomonas aeruginosa pneumonia?
A) Firstgeneration (e.g., cefazolin)
B) Secondgeneration (e.g., cefuroxime)
C) Thirdgeneration (e.g., ceftriaxone)
D) Fourthgeneration (e.g., cefepime)
Answer: D) Fourthgeneration (e.g., cefepime)
Explanation: Fourthgeneration cephalosporins (cefepime) have enhanced activity against Pseudomonas
aeruginosa and other gramnegative organisms. Thirdgeneration cephalosporins like ceftriaxone do not
cover Pseudomonas.
,3. Vancomycin is indicated as the firstline treatment in which of the following scenarios?
A) Communityacquired pneumonia caused by Streptococcus pneumoniae
B) Methicillinresistant Staphylococcus aureus (MRSA) bacteremia
C) Uncomplicated urinary tract infection
D) Early syphilis in a penicillinallergic patient
Answer: B) Methicillinresistant Staphylococcus aureus (MRSA) bacteremia
Explanation: Vancomycin is the firstline treatment for MRSA infections, including bacteremia. It is a
glycopeptide antibiotic that inhibits cell wall synthesis by binding to DalanylDalanine precursors.
4. The peak nephrotoxic and ototoxic risks of aminoglycoside therapy are due to their accumulation in
which anatomical locations?
A) Pulmonary alveoli and alveolar macrophages
B) Renal tubular cells and cochlear hair cells
C) Hepatic sinusoidal cells and biliary ducts
D) Intestinal epithelial cells and Peyer's patches
Answer: B) Renal tubular cells and cochlear hair cells
Explanation: Aminoglycosides accumulate in renal tubular cells (causing nephrotoxicity) and cochlear
hair cells (causing ototoxicity). These toxicities are concentrationdependent and require therapeutic
drug monitoring.
,5. The clinical efficacy of oral tetracyclines is reduced when coadministered with which of the following?
A) Highfat meals
B) Ferrous sulfate supplements
C) Betablockers
D) ACE inhibitors
Answer: B) Ferrous sulfate supplements
Explanation: Tetracyclines chelate with divalent and trivalent cations (calcium, magnesium, iron, zinc),
forming insoluble complexes that reduce absorption. Ferrous sulfate (iron) significantly decreases
tetracycline absorption.
6. Which of the following macrolides has the greatest potential for significant CYP3A4mediated drug
interactions?
A) Azithromycin
B) Clarithromycin
C) Fidaxomicin
D) Telithromycin
Answer: B) Clarithromycin
Explanation: Clarithromycin is a potent CYP3A4 inhibitor, leading to significant drug interactions (e.g.,
with statins, warfarin, calcium channel blockers). Azithromycin has minimal CYP3A4 inhibition.
7. Clindamycin is most strongly associated with which potentially lifethreatening adverse effect?
, A) Hemolytic anemia
B) Hepatic failure
C) Clostridioides difficileassociated diarrhea
D) StevensJohnson Syndrome
Answer: C) Clostridioides difficileassociated diarrhea
Explanation: Clindamycin is strongly associated with C. difficile infection (CDI) due to its broad anaerobic
coverage and disruption of normal gut flora. CDI can lead to pseudomembranous colitis, which is
lifethreatening.
8. What is the primary concern when coadministering linezolid with selective serotonin reuptake
inhibitors (SSRIs)?
A) QT prolongation
B) Risk of serotonin syndrome
C) Myelosuppression
D) Increased hepatic metabolism
Answer: B) Risk of serotonin syndrome
Explanation: Linezolid is a weak monoamine oxidase inhibitor (MAOI). When combined with SSRIs, it
increases the risk of serotonin syndrome, which can be life threatening. Patients should be monitored for
signs of serotonin excess.
9. Sulfonamides and trimethoprim exert their antimicrobial effect through inhibition of which of the
following pathways?
A) Bacterial DNA replication
2026/2027 | 200 Practice Questions and Verified Answers |
UTA Advanced Pharmacology | A+ Graded
1. Which of the following best explains the mechanism of action of betalactam antibiotics?
A) Inhibit bacterial folic acid synthesis
B) Inhibit protein synthesis at the 30S ribosomal subunit
C) Inhibit transpeptidation involved in bacterial cell wall synthesis
D) Disrupt DNA gyrase and topoisomerase IV function
Answer: C) Inhibit transpeptidation involved in bacterial cell wall synthesis
Explanation: Betalactam antibiotics (penicillins, cephalosporins, carbapenems, monobactams) inhibit
transpeptidase enzymes (penicillinbinding proteins, PBPs) that crosslink peptidoglycan chains in the
bacterial cell wall, leading to cell lysis.
2. Which cephalosporin generation would be most appropriate for treating a hospitalized patient with
suspected Pseudomonas aeruginosa pneumonia?
A) Firstgeneration (e.g., cefazolin)
B) Secondgeneration (e.g., cefuroxime)
C) Thirdgeneration (e.g., ceftriaxone)
D) Fourthgeneration (e.g., cefepime)
Answer: D) Fourthgeneration (e.g., cefepime)
Explanation: Fourthgeneration cephalosporins (cefepime) have enhanced activity against Pseudomonas
aeruginosa and other gramnegative organisms. Thirdgeneration cephalosporins like ceftriaxone do not
cover Pseudomonas.
,3. Vancomycin is indicated as the firstline treatment in which of the following scenarios?
A) Communityacquired pneumonia caused by Streptococcus pneumoniae
B) Methicillinresistant Staphylococcus aureus (MRSA) bacteremia
C) Uncomplicated urinary tract infection
D) Early syphilis in a penicillinallergic patient
Answer: B) Methicillinresistant Staphylococcus aureus (MRSA) bacteremia
Explanation: Vancomycin is the firstline treatment for MRSA infections, including bacteremia. It is a
glycopeptide antibiotic that inhibits cell wall synthesis by binding to DalanylDalanine precursors.
4. The peak nephrotoxic and ototoxic risks of aminoglycoside therapy are due to their accumulation in
which anatomical locations?
A) Pulmonary alveoli and alveolar macrophages
B) Renal tubular cells and cochlear hair cells
C) Hepatic sinusoidal cells and biliary ducts
D) Intestinal epithelial cells and Peyer's patches
Answer: B) Renal tubular cells and cochlear hair cells
Explanation: Aminoglycosides accumulate in renal tubular cells (causing nephrotoxicity) and cochlear
hair cells (causing ototoxicity). These toxicities are concentrationdependent and require therapeutic
drug monitoring.
,5. The clinical efficacy of oral tetracyclines is reduced when coadministered with which of the following?
A) Highfat meals
B) Ferrous sulfate supplements
C) Betablockers
D) ACE inhibitors
Answer: B) Ferrous sulfate supplements
Explanation: Tetracyclines chelate with divalent and trivalent cations (calcium, magnesium, iron, zinc),
forming insoluble complexes that reduce absorption. Ferrous sulfate (iron) significantly decreases
tetracycline absorption.
6. Which of the following macrolides has the greatest potential for significant CYP3A4mediated drug
interactions?
A) Azithromycin
B) Clarithromycin
C) Fidaxomicin
D) Telithromycin
Answer: B) Clarithromycin
Explanation: Clarithromycin is a potent CYP3A4 inhibitor, leading to significant drug interactions (e.g.,
with statins, warfarin, calcium channel blockers). Azithromycin has minimal CYP3A4 inhibition.
7. Clindamycin is most strongly associated with which potentially lifethreatening adverse effect?
, A) Hemolytic anemia
B) Hepatic failure
C) Clostridioides difficileassociated diarrhea
D) StevensJohnson Syndrome
Answer: C) Clostridioides difficileassociated diarrhea
Explanation: Clindamycin is strongly associated with C. difficile infection (CDI) due to its broad anaerobic
coverage and disruption of normal gut flora. CDI can lead to pseudomembranous colitis, which is
lifethreatening.
8. What is the primary concern when coadministering linezolid with selective serotonin reuptake
inhibitors (SSRIs)?
A) QT prolongation
B) Risk of serotonin syndrome
C) Myelosuppression
D) Increased hepatic metabolism
Answer: B) Risk of serotonin syndrome
Explanation: Linezolid is a weak monoamine oxidase inhibitor (MAOI). When combined with SSRIs, it
increases the risk of serotonin syndrome, which can be life threatening. Patients should be monitored for
signs of serotonin excess.
9. Sulfonamides and trimethoprim exert their antimicrobial effect through inhibition of which of the
following pathways?
A) Bacterial DNA replication
