Pharmacology Practice Test

Question 1

A patient is prescribed penicillin for a gram-positive bacterial infection. What is the primary mechanism by which this antibiotic exerts its bactericidal effect?

Inhibition of DNA gyrase, preventing bacterial DNA replication. Binding to the 30S ribosomal subunit to disrupt protein synthesis. Inhibition of transpeptidase, preventing peptidoglycan cell wall cross-linking. Creation of pores in the bacterial cell membrane, causing leakage of intracellular contents.

Correct Answer:

Inhibition of transpeptidase, preventing peptidoglycan cell wall cross-linking.

Question 2

A 68-year-old male with a history of atrial fibrillation, well-controlled on warfarin, is diagnosed with oropharyngeal candidiasis and is prescribed a course of oral fluconazole. What is the most significant potential interaction the pharmacist should be concerned about?

Inhibition of warfarin metabolism, leading to a supratherapeutic INR and increased risk of bleeding. Increased metabolism of warfarin, leading to a subtherapeutic INR and risk of thrombosis. Decreased absorption of fluconazole, leading to antifungal treatment failure. Displacement of warfarin from plasma proteins by fluconazole, causing a transient increase in free drug.

Correct Answer:

Inhibition of warfarin metabolism, leading to a supratherapeutic INR and increased risk of bleeding.

Question 3

Which of the following statements most accurately describes the mechanism of action of acyclovir in treating a herpes simplex virus (HSV) infection?

It acts as a neuraminidase inhibitor, preventing the release of newly formed virions from the host cell. It directly inhibits the fusion of the viral envelope with the host cell membrane. It prevents the uncoating of the viral genome after it enters the host cell. It is a guanosine analog that, after phosphorylation by viral thymidine kinase, inhibits viral DNA polymerase and causes chain termination.

Correct Answer:

It is a guanosine analog that, after phosphorylation by viral thymidine kinase, inhibits viral DNA polymerase and causes chain termination.

Question 4

A patient undergoing chemotherapy with a regimen that includes cisplatin is closely monitored for adverse effects. Which of the following is a well-known and often dose-limiting toxicity of this agent?

Cardiotoxicity Nephrotoxicity Pulmonary fibrosis Hemorrhagic cystitis

Correct Answer:

Nephrotoxicity

Question 5

A patient is admitted with a severe skin and soft tissue infection. Cultures grow Staphylococcus aureus that is resistant to oxacillin. This resistance is conferred by the mecA gene. What is the primary mechanism of resistance in this organism?

Increased production of beta-lactamase enzymes that hydrolyze the antibiotic. Efflux pumps that actively transport the antibiotic out of the bacterial cell. Alteration of the drug's target site, the penicillin-binding protein (PBP). Modification of the antibiotic molecule by bacterial enzymes.

Correct Answer:

Alteration of the drug's target site, the penicillin-binding protein (PBP).

Question 1

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Prepare with the Pharmacology Practice Test practice quiz. This question bank includes 30 questions covering patient, mechanism, primary, treated, and effect. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Pharmacology Practice Test

This practice set contains 30 questions from the matching question bank and focuses on patient, mechanism, primary, treated, and effect. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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Pharmacology Practice Test

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