AS & A Level Biology (9700) — October–November 2023, Paper 41
10 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Chloroplasts carry out photosynthesis. Fig. 1.1 shows some structural features of a chloroplast and some processes that occur within it: CO₂ entering and product D leaving from…
Answer this question and get it marked →Biodiversity can be assessed at three different levels. One of these is the genetic variation within each species. Outline two other levels at which biodiversity can be measured.
Answer this question and get it marked →There are more than 600 plant species in the genus Ipomoea. The gene that determines flower colour in Ipomoea purpurea (common morning glory) has two alleles: a dominant allele…
Answer this question and get it marked →The potato plant, Solanum tuberosum, is an important food crop; crop yield is reduced if the leaves are eaten by the larvae of the Colorado beetle, Leptinotarsa decemlineata. Crop…
Answer this question and get it marked →The respiratory quotient (RQ) values for different respiratory substrates can be calculated. Table 5.1 shows the formulae of four respiratory substrates and the number of oxygen…
Answer this question and get it marked →The tiger barb, Puntigrus tetrazona, is a South American fish popular as an aquarium fish. Tiger barbs that show a wild-type phenotype are gold with black stripes; those with an…
Answer this question and get it marked →When an impulse arrives at a neuromuscular junction, it stimulates a muscle fibre of striated muscle to contract. Outline the similarities in structure between a neuromuscular…
Answer this question and get it marked →Environmental conditions such as light intensity affect plant physiology. Use the letter X to identify a point on the sketch graph in Fig. 8.1 where light intensity is acting as a…
Answer this question and get it marked →Green lacewings are a family of insects with more than 1300 species. Green lacewings have sense organs, known as tympanal organs, that detect sound. The tympanal organ of green…
Answer this question and get it marked →Medicine is defined as the diagnosis, treatment and prevention of disease. Outline the different ways in which genetic technology can be applied to medicine, with reference to…
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