Stepwise mutation for drug resistance is seen with_____________?

Correct answer: A. Penicillin

  • A. Penicillin
  • B. Streptomycin
  • C. Garamycin
  • D. Kanamycin

Explanation

Penicillin resistance usually develops through a stepwise accumulation of mutations, unlike streptomycin resistance, which can arise from a single-step mutation. This distinction explains why combination therapy may be needed with drugs such as streptomycin.

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