Introduction to microbe structure

    • Microbe structure is a core JC1 topic in H2 BIO A levels. This topic explores what makes up the cellular structure of a typical bacteria so that one can see how it differs from eukaryotes. This is in contrast to viruses which will cover a standard structure as well as specific examples such as bacteriophages, influenza virus and HIV.

    Curated materials for microbe structure

    Most common phrasing errors made by students during exams

    • Bacterial DNA is circular hence it is not a double-stranded

    Exam tips

    • In´╗┐ prokaryotes, 70S ribosome is present in the cytoplasm
    • Eukaryotes 80S ribosomes are present in the cytoplasm (translated proteins stay and function in the cytosol) and on the RER (translated proteins that undergo modification and destined for the GA) AND 70S ribsosomes similar to prokaryotes are found in the mitochondria and chloroplast
    • There are many exceptions to observations of viruses, so careful phrasing is important, e.g. MAJORITY of viruses have either DNA or RNA genomes etc
    • When discussing virus as living or non-living organisms, remember to add the perspective of the cell theory whenever possible
    • When discussing virus as living or non-living organisms, if not specified present both sides of argument (for & against)

    Questions and other matters

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    • You may also be interested to know how to boost your performance for A levels.