AS & A Level Biology (9700) — October–November 2023, Paper 21
6 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Scientists measured the concentration of sodium ions and potassium ions in the red blood cells and in the blood plasma of a group of people. The results are shown in Table 1.1.…
Answer this question and get it marked →Fig. 2.1 is a transmission electron micrograph showing a section of a specialised epithelial cell found in the lining of the stomach. This cell produces extracellular proteins…
Answer this question and get it marked →Plants have specialised cells for the efficient transport of assimilates. Table 3.1 shows some of the features of two different types of cell found in plant tissue, which are…
Answer this question and get it marked →Some people who are infected with HIV develop HIV/AIDS. Fig. 4.1 shows the number of people that have been newly infected with HIV in 2018 across the world and the percentage…
Answer this question and get it marked →Fig. 5.1 is a photomicrograph of a transverse section of a bronchus in the lungs. The tissue labelled smooth muscle and the tissue labelled T are shown. Identify the tissue…
Answer this question and get it marked →State the name of the phase of the mitotic cell cycle during which DNA replication occurs.
Answer this question and get it marked →← October–November 2023 Paper 22 · October–November 2023 Paper 13 →