IGCSE Biology (0610) — October–November 2024, Paper 21
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →A living organism, X, can make its own food, get rid of toxic materials and detect and respond to stimuli. What other four processes must organism X carry out to stay alive? A…
Answer this question and get it marked →The diagram shows an animal. Using the key, which genus does the animal belong to? Key: has jointed legs - three pairs of legs (- has tail = A Hexagenia; no tail = B Dytiscus) or…
Answer this question and get it marked →Which statement is true for all species of organisms? A A species is a group of organisms that are genetically identical. B A species is a group of organisms that produce fertile…
Answer this question and get it marked →Which group of living organisms includes the myriapods? A arthropods B prokaryotes C protoctists D vertebrates
Answer this question and get it marked →The diagram shows a liver cell. Which features are present in this cell and also in most plant cells? A cell membrane and cytoplasm B cell membrane and sap vacuole C cell wall and…
Answer this question and get it marked →A tick is a type of arachnid. The length of an adult tick is 2.3 mm. What is the length of the tick in micrometres? A 0.23 micrometres B 23 micrometres C 230 micrometres D 2300…
Answer this question and get it marked →Cylinders of potato tissue were left in different concentrations of sucrose solution for one hour. The graph shows the percentage change in the length of the potato cylinders…
Answer this question and get it marked →Which statement about biological molecules is correct? A DNA molecules contain pairs of bases: A pairs with G and C pairs with T. B Fatty acids and glycerol molecules can be…
Answer this question and get it marked →The graph shows how temperature affects an enzyme-controlled reaction, with points A, B, C and D marked on the curve. Where on the graph do the enzyme and substrate molecules have…
Answer this question and get it marked →Which substance is an energy store that is made in plant cells from the products of photosynthesis? A cellulose B glycogen C nectar D starch
Answer this question and get it marked →Which nutrient is lacking when a person has scurvy? A calcium B iron C vitamin C D vitamin D
Answer this question and get it marked →The diagram shows part of the alimentary canal with structures labelled J, K, L and M. Which row correctly identifies the structures labelled J to M? A J oesophagus, K pancreas, L…
Answer this question and get it marked →Which statement about enzymes in digestion is correct? A Amylase catalyses the breakdown of fats to fatty acids and glycerol. B Amylase catalyses the breakdown of oils to fatty…
Answer this question and get it marked →The diagram shows a villus with regions labelled X and Y. Which statement about absorption is correct? A Amino acids move into X. B Fatty acids move into X. C Cellulose moves into…
Answer this question and get it marked →Which substance strengthens the walls of xylem vessels? A glycerol B glycogen C lignin D starch
Answer this question and get it marked →Which row explains why a plant wilts? (columns: water loss at the leaf surface; water uptake in the roots; state of the plant cells) A low; high; flaccid B low; high; turgid C…
Answer this question and get it marked →Scientists investigated the movement of sucrose through a plant using carbon dioxide containing radioactive carbon, 14C. They covered one leaf on a plant with a clear plastic bag…
Answer this question and get it marked →The diagram shows a section through the human heart with valves labelled A, B, C and D. Which valve is the right atrioventricular valve? A A B B C C D D
Answer this question and get it marked →Which row shows the features of a blood vessel that transports blood at low pressure? (columns: size of lumen; thickness of wall; valves) A large; thick; absent B small; thin;…
Answer this question and get it marked →The diagram shows a component of blood. What is the name of this component? A lymphocyte B phagocyte C platelet D red blood cell
Answer this question and get it marked →Which statement about immunity is correct? A Antibodies are present on the surface of pathogens. B Antibodies are produced by lymphocytes. C Antigens are produced by memory cells.…
Answer this question and get it marked →The intercostal muscles and diaphragm contract and relax during ventilation. Which row shows the actions of muscles that result in the largest volume inside the thorax? (columns:…
Answer this question and get it marked →How many molecules of carbon dioxide, glucose, oxygen and water are there in the balanced chemical equation for aerobic respiration? (columns: carbon dioxide; glucose; oxygen;…
Answer this question and get it marked →Where is urea formed and excreted? (columns: formed; excreted) A bladder; heart B heart; liver C kidney; bladder D liver; kidney
Answer this question and get it marked →A growing seedling was pinned sideways onto a wooden board covered in wet blotting paper and kept in a dark box. The diagram shows the seedling after 24 hours; auxin had become…
Answer this question and get it marked →Which statement describes a drug? A a substance that is produced in the body and alters the activity of target organs B a substance that is produced in the body and increases the…
Answer this question and get it marked →The diagram shows a plant that is producing small plantlets. Which statement about the plantlets is correct? A They are genetically different from the parent plant. B They are…
Answer this question and get it marked →Which hormone maintains the thickness of the lining of the uterus during pregnancy? A follicle-stimulating hormone (FSH) B luteinising hormone (LH) C oestrogen D progesterone
Answer this question and get it marked →The table shows the number of new HIV infections in 1990 and 2021 in one country: 1990 = 8800; 2021 = 830. Which statement could explain the change in the number of new HIV…
Answer this question and get it marked →Where are amino acids assembled into protein molecules? A the DNA B the genes C the nucleus D the ribosomes
Answer this question and get it marked →The diagram shows the changes in the mass of DNA in one cell before, during and after mitosis, with point X marked where the mean mass of DNA per cell doubles. What is happening…
Answer this question and get it marked →A woman who has blood group AB has a child with a man who has blood group B and is heterozygous. What is the chance of the child having blood group B? A 0% B 25% C 50% D 100%
Answer this question and get it marked →Plants are adapted to survive in different environments. What are features of xerophytes? (columns: cuticle; number of stomata) A thick; few B thick; many C thin; few D thin; many
Answer this question and get it marked →Which diagram correctly shows the flow of energy? A producers - consumers, with both - decomposers B consumers - producers - decomposers C producers - consumers, with both -…
Answer this question and get it marked →The diagram shows a food chain: tree - small insects - small birds - birds of prey. What is the correct pyramid of numbers for this food chain? A pyramid A B pyramid B C pyramid C…
Answer this question and get it marked →Acidic soils encourage the increase of anaerobic bacteria that cause denitrification. How do acidic conditions affect the nitrogen cycle? A Ammonia will not enter the nitrogen…
Answer this question and get it marked →The graph shows the population of yeast over a period of time (number of yeast cells against time), with phases A, B, C and D marked. Which phase shows when the number of yeast…
Answer this question and get it marked →Wheat plants are often grown in large areas as a monoculture. What is a negative environmental impact of this method of farming? A The variety of species in the area is reduced. B…
Answer this question and get it marked →How will these natural processes be affected by deforestation? (columns: flooding; loss of soil; transpiration) A decreased; decreased; increased B decreased; increased; decreased…
Answer this question and get it marked →The stages describe how genetic modification can be used to produce human insulin from bacteria. 1 Cut bacterial plasmid DNA with restriction enzymes. 2 Extract the gene for…
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