Multiple choice Which of the following enzymes acts on peroxide as an acceptor? Superoxide dismutase Cytochrome c oxidase Nitrate reductase Catalase Glutathione reductase Reveal answer Fill a bubble to check yourself D Correct answer Explanation Catalase belongs to Category EC 1.11 of oxidoreductases (EC 1), which act on peroxide as an acceptor. Catalase catalyses the decomposition of hydrogen peroxide to water and oxygen.