everyday science MCQ #1485

All the metabolic reactions in organisms are catalysed by:

everyday science MCQ #1485

  1. Question 1

    Q1. All the metabolic reactions in organisms are catalysed by:

    • A) Vitamins
    • B) Hormones
    • C) Enzymes
    • D) Minerals

    Answer: Enzymes

    Explanation: Enzymes are biological catalysts (proteins) that lower the activation energy of metabolic reactions, enabling the thousands of chemical processes that sustain life to occur at body temperature.