Drug Resistance Mechanisms · Pharmacology

Which mechanism is associated with multidrug resistance (MDR)?

  1. Single point mutation
  2. Efflux pump overexpression
  3. Increased enzyme activation
  4. Enhanced protein synthesis
Show answer and explanation

Correct answer: Efflux pump overexpression

Overexpression of efflux pumps can remove multiple structurally unrelated antibiotics from bacterial cells. This contributes to multidrug resistance.

Difficulty: Medium Question 17 of 20

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