AS & A Level Biology (9700) — May–June 2025, Paper 34
2 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
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Catalase is an enzyme found in yeast cells. It catalyses the breakdown of hydrogen peroxide to produce water and oxygen. You will investigate the effect of copper sulfate on this…
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M1 is a slide of a stained transverse section through a leaf. Draw a large plan diagram of the region of the leaf on M1 indicated by the shaded area in Fig. 2.1 (a midrib region…
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