IGCSE Biology (0970) — May–June 2025, Paper 22
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →The photograph shows an animal called a margay. (A photograph shows a margay, a spotted wild cat, resting on a tree branch.) Four processes that occur in the margay are listed. -…
Answer this question and get it marked →Part of the base sequence of DNA from four species was determined. species 1 T C A G G A T T species 2 T G A G C A A T species 3 T G A G C A A G species 4 T G A G G A T T Which…
Answer this question and get it marked →A single-celled organism has chloroplasts, a cell wall and a nucleus. Which kingdom is this organism placed in? A fungus B plant C prokaryote D protoctist
Answer this question and get it marked →What is a leaf? A a cell B an organ C an organ system D a tissue
Answer this question and get it marked →A student measured the length of a structure using a microscope. The magnification used was ×250. The image size of the structure was 5.00 mm. What was the actual length of the…
Answer this question and get it marked →Which row shows the conditions when diffusion of oxygen into the blood is fastest? alveolar surface area concentration gradient diffusion path distance --- --- --- --- A high high…
Answer this question and get it marked →Uncooked potato cylinders of identical size were placed in four different liquids for two hours. The different liquids are listed. 1 pure water 2 a sugar solution that was less…
Answer this question and get it marked →What is the correct definition of enzymes? A carbohydrates that act as biological catalysts B carbohydrates that act as substrates C proteins that act as biological catalysts D…
Answer this question and get it marked →A student investigated how the rate of photosynthesis is affected by carbon dioxide concentration, temperature and light intensity. The graphs show the results. Graph 1: rate of…
Answer this question and get it marked →The diagram shows a cross-section of part of a leaf. Cell X is in the upper layer of elongated, column-shaped cells packed with chloroplasts, just beneath the upper epidermis.…
Answer this question and get it marked →In which parts of the digestive system does physical digestion occur? The diagram shows a human torso with parts of the digestive system labelled: 1 is in the mouth region; 2 is…
Answer this question and get it marked →The table shows the substrates and end products in four enzyme-controlled chemical reactions. Which reaction was controlled by lipase? substrate end product --- --- --- A maltose…
Answer this question and get it marked →What is the function of microvilli in the small intestine? A conduction of electrical impulses B increasing surface area for absorption C movement of food particles D movement of…
Answer this question and get it marked →Which row shows the features of xylem vessels? vessel walls mitochondria present --- --- --- A thick yes B thick no C thin yes D thin no
Answer this question and get it marked →A student wanted to investigate the effect of humidity on transpiration. She set up two sets of apparatus with identical-sized plants of the same species. Tube X holds a leafy…
Answer this question and get it marked →What is an advantage of a double circulatory system? A It allows the mixing of oxygenated and deoxygenated blood. B It can keep blood pressure high in the lungs. C Less carbon…
Answer this question and get it marked →Which structure in the heart separates oxygenated and deoxygenated blood? A atrioventricular valve B muscle wall of left atrium C semilunar valve D septum
Answer this question and get it marked →Which row shows the features of a vein? relative thickness of the wall to total vessel diameter diameter of the lumen presence or absence of valves --- --- --- --- A thick large…
Answer this question and get it marked →Three statements about immunity are listed. 1 The transfer of antibodies from mother to baby in breast milk is an example of passive immunity. 2 Passive immunity results in…
Answer this question and get it marked →The table shows the breathing rate and the average total volume of air breathed by a student when exercising for 20 minutes. time /minutes breathing rate /breaths per minute…
Answer this question and get it marked →What is the chemical formula of glucose? A C6H6O6 B C6HO6 C C6H12O6 D C12H12O6
Answer this question and get it marked →After a race, athletes experience oxygen debt. The diagram shows how the oxygen debt is removed. The diagram is a cycle: 'lactic acid forms in the muscles' leads to 'lactic acid…
Answer this question and get it marked →Which organ produces urea? A bladder B kidney C liver D pancreas
Answer this question and get it marked →The diagram shows a vertical section through part of a human eye. A fly is coming nearer to the eye. The eye begins to focus the image of the fly on the retina. Labelled parts: Q…
Answer this question and get it marked →Which organ produces glucagon? A adrenal gland B liver C ovary D pancreas
Answer this question and get it marked →A young seedling is growing underground. The shoot grows towards the surface of the ground. The root grows away from the surface of the ground. Which row describes the responses…
Answer this question and get it marked →Clostridium difficile is a species of bacterium that is resistant to many antibiotics. From 2002 to 2006, the number of people in one country infected with Clostridium difficile…
Answer this question and get it marked →What are the characteristics of asexual reproduction? fusion of gamete nuclei genetic variety in the offspring --- --- --- A yes yes B yes no C no yes D no no
Answer this question and get it marked →Which description of cross-pollination is correct? A the transfer of pollen grains from the anther of one plant to the stigma on a different plant B the transfer of pollen grains…
Answer this question and get it marked →Which row correctly links the named process with its description? process description --- --- --- A menstruation release of an egg B menstruation shedding of the lining of the…
Answer this question and get it marked →The diagram shows the inheritance of a genetic condition in one family. The pedigree chart uses a key: shaded circle = female with condition; unshaded circle = female without…
Answer this question and get it marked →What is a way in which new alleles are formed? A artificial selection B mutation C natural selection D sexual reproduction
Answer this question and get it marked →How does artificial selection differ from natural selection? A Artificial selection changes the characteristics of living things. B Artificial selection is based on genetic…
Answer this question and get it marked →Which diagram of a xerophyte is labelled correctly? Each option shows a cactus-like plant with two labels. The correct labels for a xerophyte are 'waxy layer to stop water…
Answer this question and get it marked →Which row describes the energy flow into and through a food chain that starts with a plant? energy entering a food chain energy transferred between organisms in a food chain ---…
Answer this question and get it marked →In a food chain, zebras are large mammals that eat grass. The zebras have many insects living on them which suck their blood. Birds eat the insects. The diagrams show some…
Answer this question and get it marked →The diagram shows part of the nitrogen cycle. 'organic material' leads to 'ammonium ions'; 'ammonium ions' leads via process X to 'nitrate ions'; 'nitrate ions' leads to 'nitrogen…
Answer this question and get it marked →The graph shows the number of water fleas in a newly-created pond. The curve shows a lag phase, then a rapid (exponential) rise, then a plateau; at the point labelled Y the…
Answer this question and get it marked →When managing fish stocks as a sustainable resource, what is a reason for harvesting only the larger fish of a particular species? A Larger fish are easier to harvest. B Larger…
Answer this question and get it marked →Which features make bacteria useful in biotechnology? 1 They are unaffected by antibiotics. 2 They do not contain plasmids. 3 They make complex molecules. 4 They reproduce…
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