Skip to content
    Biology A-Level

    Chain-termination mechanism

    What Chain-termination mechanism means in Biology A-Level, as defined for OCR.

    Definition of Chain-termination mechanism

    Check what you remember

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

    Reference: OCR

    A method relying on a template strand, a primer, DNA polymerase and a mixture of normal deoxynucleotides plus modified dideoxynucleotides that terminate chain extension.
    OCR · Manipulating genomes (study guide)

    Topics that use Chain-termination mechanism

    Related terms

    Using Chain-termination mechanism 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 A-Level terms