MDCAT Biology MCQ #3286

Cyanide combines with the iron of cytochrome oxidase at a site other than the active site, blocking respiration. This is:

MDCAT Biology MCQ #3286

  1. Question 1

    Q1. Cyanide combines with the iron of cytochrome oxidase at a site other than the active site, blocking respiration. This is:

    • A) Non-competitive inhibition
    • B) Competitive inhibition
    • C) Reversible inhibition
    • D) Feedback inhibition

    Answer: Non-competitive inhibition

    Explanation: Non-competitive inhibitors bind to separate sites; competitive inhibitors must resemble the substrate to occupy the active site, which cyanide does not.