Skip to content
    Biology GCSE

    Enzyme

    What Enzyme means in Biology GCSE, as defined for AQA.

    Definitions of Enzyme

    Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.

    Check what you remember

    Read the wording for your board, then hide it and explain Enzyme in your own words. Rough notes are fine. This is a self-check, with no mark or grade.

    Reference: AQA

    A protein that functions as a biological catalyst, speeding up reactions without being used up.
    AQA · The human digestive system (study guide)
    A biological catalyst made of protein that speeds up chemical reactions without being used up.
    AQA · Communities (study guide)

    Topics that use Enzyme

    Related terms

    Using Enzyme in the exam

    Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.

    Practise Biology questions

    Create a free account to answer exam-style questions on this topic and get feedback on your answers.

    Start free

    A week of Premium from your first lesson · Then the free plan continues · No card, no charge

    All Biology GCSE terms