NURS 5334 ANTIMICROBIALS FINAL EXAM VERSION 1 AND 2 NEWEST 2025 ACTUAL FINAL EXAM , VERIFIED AND 100% CORRECT GUARANTEED PASS

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NURS 5334 ANTIMICROBIALS FINAL EXAM VERSION 1 AND 2
NEWEST 2025 ACTUAL FINAL EXAM 2025-2026, VERIFIED AND
100% CORRECT GUARANTEED PASS



1. Mechanism of Action – Cell Wall Inhibitors

Question: Which antibiotic inhibits bacterial cell wall synthesis by binding
to penicillin-binding proteins?
A) Ciprofloxacin
B) Vancomycin
C) Azithromycin
D) Doxycycline
Correct Answer: B
Rationale: Vancomycin inhibits cell wall synthesis by binding to the D-Ala-
D-Ala terminus of peptidoglycan precursors.
Reference: CDC – Vancomycin Mechanism


2. Adverse Effect – Tendon Rupture

Question: Which class of antibiotics is most associated with tendon rupture?
A) Aminoglycosides
B) Fluoroquinolones
C) Cephalosporins
D) Macrolides
Correct Answer: B
Rationale: Fluoroquinolones carry an FDA black box warning for tendon
rupture, especially in older adults and corticosteroid users.
Reference: FDA Safety Communication


3. Mechanism of Action – Macrolides

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Question: A patient with pneumonia is started on azithromycin. What is its
primary mechanism of action?
A) Inhibits cell wall synthesis
B) Inhibits DNA gyrase
C) Inhibits 50S ribosomal subunit
D) Disrupts cell membrane integrity
Correct Answer: C
Rationale: Macrolides bind to the 50S ribosomal subunit and block bacterial
protein synthesis.
Reference: Johns Hopkins ABX Guide – Macrolides


4. Resistance Mechanisms

Question: MRSA’s resistance to methicillin is due to:
A) β-lactamase production
B) Altered penicillin-binding protein (PBP2a)
C) Efflux pumps
D) Porin channel mutation
Correct Answer: B
Rationale: MRSA acquires the mecA gene, producing PBP2a that has low
affinity for β-lactam antibiotics.
Reference: CDC – MRSA Overview


5. Narrow vs. Broad Spectrum

Question: Which of the following is a narrow-spectrum antibiotic?
A) Penicillin G
B) Piperacillin-tazobactam
C) Meropenem
D) Levofloxacin
Correct Answer: A
Rationale: Penicillin G primarily targets gram-positive organisms and is
considered narrow spectrum.
Reference: Sanford Guide – Penicillin

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6. Aminoglycoside Toxicity

Question: Gentamicin’s most concerning adverse effects are:
A) Hepatotoxicity & rash
B) Nephrotoxicity & ototoxicity
C) QT prolongation & myopathy
D) Pancreatitis & hyperlipidemia
Correct Answer: B
Rationale: Aminoglycosides accumulate in the renal cortex and inner ear,
causing toxicity.
Reference: MedlinePlus – Gentamicin


7. Time-Dependent Killing

Question: Which antibiotic class works best when serum concentration is
maintained above the MIC for the majority of the dosing interval?
A) β-lactams
B) Aminoglycosides
C) Fluoroquinolones
D) Daptomycin
Correct Answer: A
Rationale: β-lactams exhibit time-dependent killing, so frequent dosing or
continuous infusion is used.
Reference: Clinical Pharmacokinetics – Time vs Concentration Dependent


8. Pregnancy Safety

Question: Which antibiotic is contraindicated in pregnancy due to risk of
tooth discoloration?
A) Azithromycin
B) Doxycycline
C) Ceftriaxone
D) Metronidazole

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Correct Answer: B
Rationale: Tetracyclines cross the placenta and affect fetal bone and teeth
development.
Reference: ACOG Guidance – Antibiotic Use


9. Pseudomonas Coverage

Question: Which of the following covers Pseudomonas aeruginosa?
A) Ceftriaxone
B) Piperacillin-tazobactam
C) Cefazolin
D) Azithromycin
Correct Answer: B
Rationale: Piperacillin-tazobactam is a broad-spectrum β-lactam with
reliable Pseudomonas coverage.
Reference: IDSA Guidelines – Pseudomonas


10. Clostridioides difficile Risk

Question: Which antibiotic class carries the highest risk for C. difficile
infection?
A) Clindamycin
B) Nitrofurantoin
C) Fosfomycin
D) TMP-SMX
Correct Answer: A
Rationale: Clindamycin disrupts gut flora and is strongly associated with C.
difficile colitis.
Reference: CDC – C. diff Risk



11. Mechanism of Action – Fluoroquinolones