AS & A Level Biology (9700) — May–June 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 cells in a tissue are often at different stages of the cell cycle. Fig. 1.1 shows cells at different stages of the cell cycle. Four cells are labelled A, B, C and D, showing…
Answer this question and get it marked →The number of cases of tuberculosis (TB) is affected by many biological, social and economic factors. The number of reported cases of TB in the USA between 1980 and 2000 is shown…
Answer this question and get it marked →Blood contains white blood cells and red blood cells. Fig. 3.1 is a photomicrograph showing different types of blood cell. It shows numerous red blood cells together with three…
Answer this question and get it marked →Food crops such as barley and wheat contain gluten. Gluten contains two proteins, glutenin and gliadin. Table 4.1 contains descriptions of the structures of glutenin and gliadin.…
Answer this question and get it marked →Phloem and xylem are specialised tissues involved in the transport of water, ions and assimilates in plants. A photomicrograph of a transverse section of a dicotyledonous stem is…
Answer this question and get it marked →Polysaccharides, such as glycogen, are composed of thousands of monomers. Oligosaccharides are carbohydrates that contain three to ten monomers in their chain. Nystose is one…
Answer this question and get it marked →