IGCSE Biology (0610) — May–June 2024, Paper 23
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Which characteristic do all living organisms show? A breathing B excretion C photosynthesis D tropism
Answer this question and get it marked →What kind of skin do amphibians have? A dry without scales B dry with scales C moist without scales D moist with scales
Answer this question and get it marked →Some components of cells are listed. 1 cell membrane 2 cell wall 3 chloroplasts
Answer this question and get it marked →cytoplasm Which cell components are present in plant cells but absent in animal cells? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4 4 The image shows a pollen grain from a grass plant.…
Answer this question and get it marked →What will increase the rate of diffusion across a gas exchange surface? A a decrease in the concentration gradient B a decrease in the diffusion distance C a decrease in the…
Answer this question and get it marked →What happens when potato plant cells are placed in pure water? A Water enters the cells and they become plasmolysed. B Water enters the cells and they become turgid. C Water…
Answer this question and get it marked →The diagrams show four molecules. C represents carbon, H represents hydrogen, O represents oxygen and N represents nitrogen. Which structure is an amino acid? A B C D CH2OH H H H…
Answer this question and get it marked →The diagram shows the effect of changing the temperature on the time taken for an enzyme to digest starch. X time taken to digest starch Y temperature Which statement about the…
Answer this question and get it marked →Which structure contains the pigment that transfers energy from light into chemical energy? A chloroplast B mitochondrion C nucleus D ribosome
Answer this question and get it marked →Which region in the leaf of a green plant contains phloem? A palisade mesophyll B spongy mesophyll C upper epidermis D vascular bundle
Answer this question and get it marked →The table shows the percentage of the daily recommended intake of nutrients in a serving of four foods. Which food would be the best choice to prevent scurvy? percentage of daily…
Answer this question and get it marked →What is the correct order of the processes that take place in the alimentary canal? A absorption, digestion, ingestion, egestion B digestion, ingestion, egestion, absorption C…
Answer this question and get it marked →Why does chewing food speed up digestion? A Bacteria in the food are killed. B Food is mixed with protease. C The surface area of the food is increased. D The taste of food is…
Answer this question and get it marked →Which substances are produced by the action of amylase on starch? A amino acids B fatty acids and glycerol C salts D sugars
Answer this question and get it marked →The diagram shows a section through a villus. key direction of blood flow 1 3 Several hours after a meal, where will the highest concentrations of amino acids and of glucose be…
Answer this question and get it marked →The diagram shows a cross-section of a plant root. Q What is a function of the part labelled Q? A storage of starch B structural support C transport of amino acids D transport of…
Answer this question and get it marked →Which part of the heart separates the deoxygenated and oxygenated blood? A atrium muscle wall B atrioventricular valve C septum D ventricle muscle wall
Answer this question and get it marked →The diagrams show four components of blood. Which component produces antibodies? A B C D
Answer this question and get it marked →The cholera bacterium produces a toxin. The toxin causes the secretion of chloride ions into the lumen of the small intestine. Why does this cause diarrhoea? A The water potential…
Answer this question and get it marked →Which structure contains cartilage? A alveoli B diaphragm C intercostal muscle D trachea
Answer this question and get it marked →The diagram shows the human breathing system. 4 3 Which labels show structures that produce changes in volume and pressure during ventilation of the lungs? A 1 and 3 B 1 only C 2…
Answer this question and get it marked →The graph shows the lactic acid concentration in the blood during exercise and during recovery after exercise. 1.0 Z blood lactic acid concentration 0.5 / mg dm–3 exercise…
Answer this question and get it marked →Which process takes place as the filtrate from a glomerulus passes along a nephron? A production of amino acids B excretion of oxygen C production of urea D reabsorption of glucose
Answer this question and get it marked →A person moves from bright light into a dark room. What changes occur in their eyes? pupil radial muscles circular muscles A constricts contract relax B constricts relax contract…
Answer this question and get it marked →A person who had not eaten for a few hours was given an injection of adrenaline. The person’s blood glucose concentration was measured for 3.5 hours. The graph shows the results.…
Answer this question and get it marked →Which statement about insulin is correct? A Insulin is produced by the liver when the blood glucose concentration is high. Its target cells are in the pancreas. B Insulin is…
Answer this question and get it marked →What is a function of the placenta? A acts as a barrier to prevent some toxins reaching the fetus B exchanges blood between the mother and the fetus C prevents the transfer of…
Answer this question and get it marked →Which diagram shows the correct inheritance of sex chromosomes? A B parent 1 parent 1 X Y X X X XX XY X XX XX parent 2 parent 2 Y XY YY Y XY XY C D parent 1 parent 1 X X X Y X XX…
Answer this question and get it marked →Which of the statements about the production of a protein are correct? 1 The sequence of bases in the gene determines the amino acid sequence used to make a protein. 2 The mRNA…
Answer this question and get it marked →In mice, the allele for brown fur is dominant to the allele for white fur. The diagram shows the inheritance of fur colour in a family of mice. key 1 2 3 4 male with brown fur…
Answer this question and get it marked →Desert plants have evolved to survive in places where very little water is available. Which process is reduced to enable them to retain as much water as possible? A transpiration…
Answer this question and get it marked →These events may happen when an antibiotic is used to treat a bacterial infection. 1 The antibiotic kills most of the bacteria. 2 The antibiotic-resistant bacteria reproduce. 3…
Answer this question and get it marked →The graphs show the beak length of offspring of a wild bird population in 2000 and in 2020. The graphs are drawn to the same scale. number of number of offspring birds offspring…
Answer this question and get it marked →What is the principal source of energy input into an ecosystem? A decomposers B herbivores C producers D the Sun
Answer this question and get it marked →The diagram shows part of the nitrogen cycle. nitrogen in the air lightning plant protein ammonium ions in soil death death uptake 1 2 3 4 by roots nitrates in soil Which numbers…
Answer this question and get it marked →What is a description of biodiversity? A the number of different animal species that live in an area B the number of different plant species that live in an area C the number of…
Answer this question and get it marked →A list of different stages that occur in the process of eutrophication is given. 1 reduction in dissolved oxygen 2 increase in nitrate ions 3 death of organisms requiring…
Answer this question and get it marked →Lignin is used to make a sustainable resource known as bioplastic. Why is bioplastic a sustainable resource? A Lignin can be produced as rapidly as it is removed from the…
Answer this question and get it marked →Which bacterial cell structure is useful in genetic modification? A cell membrane B cell wall C cytoplasm D plasmid
Answer this question and get it marked →A crop plant has been genetically modified to make it resistant to herbicides. What is a possible disadvantage of introducing this new crop plant? A The loss of weeds reduces…
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