AS & A Level Biology (9700) — May–June 2024, Paper 21
6 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Fig. 1.1 is a diagram showing part of a cell surface membrane of an animal cell. Fig. 1.1 shows a phospholipid bilayer with various components labelled A to F, and a line G-H…
Answer this question and get it marked →Water is the main component of blood. Explain how the properties of water make it suitable as the main component of blood.
Answer this question and get it marked →A class of students was studying the features of some human pathogens. One of the students constructed a flow chart to identify four different human pathogens, using information…
Answer this question and get it marked →Fig. 4.1 is a scanning electron micrograph showing the tissue that lines the bronchi in the gas exchange system (magnification x3000). Fig. 4.2 is a transmission electron…
Answer this question and get it marked →The pressure of water vapour inside and outside leaves can be measured. The difference between these pressures is known as the leaf vapour pressure deficit (LVPD). LVPD is one of…
Answer this question and get it marked →Antibodies are produced by plasma cells. Fig. 6.1 shows antigens bound to antigen-binding sites of an antibody molecule. The diagram shows a Y-shaped antibody made of two heavy…
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