AS & A Level Biology (9700) — October–November 2023, Paper 23
6 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →The malarial pathogen, Plasmodium falciparum, enters red blood cells after a person becomes infected. After some time, each cell of P. falciparum divides to form daughter cells.…
Answer this question and get it marked →Glucose is used in the synthesis of amylose. Glucose is first converted to glucose 1-phosphate (G 1-P). Starch phosphorylase is an intracellular enzyme that can catalyse the…
Answer this question and get it marked →Haemoglobin is a complex protein molecule made of four separate subunits, as shown in Fig. 3.1. The shading represents the two different polypeptides that form a molecule of…
Answer this question and get it marked →Fig. 4.1 is a diagram showing the transcription of part of the COL1A2 gene that codes for a collagen polypeptide. The part of the COL1A2 gene shown is a section of exon. Structure…
Answer this question and get it marked →In flowering plants, transport of assimilates occurs in phloem tissue between sources and sinks. Explain why a root can be a source and a sink.
Answer this question and get it marked →The mammalian heart consists of four chambers. Explain why the ventricles have thicker walls than the atria.
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