AS & A Level Biology (9700) — May–June 2024, Paper 22
6 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Smooth muscle is a tissue composed of smooth muscle cells. The cells contain cytoplasm packed with proteins that are involved in contraction and relaxation. Smooth muscle is…
Answer this question and get it marked →Alveolar macrophages are cells of the immune system that remain in the alveolar region of the gas exchange system. The macrophages protect against infection caused by pathogens…
Answer this question and get it marked →Lysozyme is an antibacterial enzyme that was discovered in 1921 by Alexander Fleming, the scientist who discovered penicillin. Lysozyme catalyses the hydrolysis of glycosidic…
Answer this question and get it marked →In the mesophyll tissue of leaves, products of photosynthesis can be used to synthesise organic compounds, such as the polysaccharide cellulose and some amino acids. A source of…
Answer this question and get it marked →During interphase of the cell cycle, individual chromosomes cannot be seen within the nucleus. The genetic material is termed chromatin during this stage. Changes occur to…
Answer this question and get it marked →Some people who are infected with HIV have HIV/AIDS. State the full term for HIV.
Answer this question and get it marked →