AS & A Level Biology (9700) — May–June 2023, Paper 31
2 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Question 1 · 20 marks · 3 Enzymes
Yeast cells contain the enzyme catalase which catalyses the breakdown of hydrogen peroxide, releasing oxygen. You will investigate the effect of pH on the activity of catalase in…
Answer this question and get it marked →Question 2 · 20 marks · 7 Transport in plants
J1 is a slide of a stained transverse section through a plant leaf. Draw a large plan diagram of the region of the leaf on J1, indicated by the shaded area in Fig. 2.1. Use a…
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