AS & A Level Biology (9700) — May–June 2025, Paper 51
2 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
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Pepsin is an enzyme that is present in gastric juice. Gastric juice is secreted into the stomach of humans and many other animals. Pepsin catalyses the hydrolysis of proteins into…
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Golden orb weaver spiders, Nephila pilipes, are found in East Asia, South-east Asia and Australia. All female golden orb weaver spiders are black with yellow spots on their legs…
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