Skip to content
    Chemistry A-Level

    primary structure unchanged

    What primary structure unchanged means in Chemistry A-Level, as defined for AQA.

    Definition of primary structure unchanged

    Check what you remember

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

    Reference: AQA

    Every peptide link, and therefore the whole primary structure, is still intact even though the chain has unravelled and the enzyme no longer works.
    AQA · Enzymes (A-level only) (study guide)

    Topics that use primary structure unchanged

    Related terms

    Using primary structure unchanged 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 Chemistry 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 Chemistry A-Level terms