Learn Extracted exam questions IGCSE Biology 0610 Biology June 2025 Question Paper 23
0610 Biology June 2025 Question Paper 23
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The diagram shows an aquatic plant in light. light water bubbles containing oxygen gas aquatic plant What is a characteristic of all living things that is demonstrated in the diagram?
The diagrams show four organisms. Which organism is a prokaryote?
What happens when plant cells are placed in a sugar solution that has a lower water potential than the cytoplasm of the cells?
In a DNA molecule, bonds between pairs of bases hold two strands together. High temperatures can break these bonds to form two single strands of DNA. The base pair C and G is held together more strongly than the base pair A and T. Two DNA molecules containing the same number of bases were studied. ● In DNA molecule 1, 20% of bases are T. ● In DNA molecule 2, 20% of bases are C. Which DNA molecule would require the lowest temperature to break into single strands?
The diagram shows a process involving an enzyme in the human stomach. + + The diagram shows another process, R, that affects this enzyme. R Which row identifies the substrate and the cause of process R? substrate cause of process R
What is the balanced chemical equation for photosynthesis?
A potato was removed from a potato plant. A 5 g cube of potato was cut and put into a beaker of distilled water. What is the most likely mass of the cube of potato after two hours?
The diagram shows the direction of net movement of two substances across a human placenta. placenta tissue P tissue Q substance 1 substance 2 Which tissue represents maternal blood and which substance is identified correctly? tissue that represents maternal blood substance that is identified correctly
The diagram shows part of a cross-section of a leaf. Which structure is a palisade mesophyll cell?
A person has swollen, bleeding gums and slow wound healing. This could be caused by a lack of which nutrient in a diet?
Digested food molecules move into the cells of the body where they are used and become part of the cells. What is this a definition of?
The diagram shows part of the human digestive system. In which part does protein digestion begin?
The diagrams show cross-sections of a leaf, a root and a stem. root leaf stem NOT TO SCALE In which row do the numbers represent the xylem in the leaf, the root and the stem? leaf root stem
Which structures in humans and in plants normally carry amino acids? arteries phloem
Through which pathway does blood leave the heart?
The photomicrograph shows some blood cells. X Which row shows the name and function of the cell labelled X? name function
Which row shows the effects of cholera on the human body? movement of chloride ions effect of a build-up of chloride ions on water potential effect on volume of water leaving the body through the anus
The plotted points, 1 and 2, on the graph show two different types of structure in the breathing system of a human. relative diameter of lumen distance from the larynx Which row identifies a structure attached to alveoli and a structure containing cartilage? a structure attached to alveoli a structure containing cartilage
Which process in plants uses energy from respiration?
Which sequence of statements explains the build-up and removal of an oxygen debt? Anaerobic respiration occurs in muscles during vigorous exercise. Faster and deeper breathing continues after exercise. Glucose is converted to lactic acid. Lactic acid builds up in muscles causing an oxygen debt. Oxygen enables the continued aerobic respiration of lactic acid.
What is filtered out of the blood in the glomerulus and into the nephron? glucose urea
What can be broken down to form urea?
The diagram shows a simple reflex arc. receptor P Q R effector What are the names of the structures labelled P, Q and R? P Q R
The diagram shows a cross-section of an eye. E F G Which row is correct when a person views a near object? E F G refraction
Which hormones increase the blood glucose concentration in humans?
A shoot tip was placed on an agar block. Substances can diffuse through agar. Light was shone on the shoot tip from one direction. X Y light shoot tip agar block After three days, the agar was cut in half to form blocks X and Y. Blocks X and Y were placed on the stems of shoots that had the tips cut off. The agar blocks were kept on the shoot stems for one week. Which set of shoots represents the results after one week? Y X
The diagram shows reproduction in a potato plant. Potato X was planted into the ground and a plant grew from it. The plant then produced potato Y. potato Y potato X Which statement is correct?
Which statement about pollination is correct?
The graph shows changes in the thickness of the lining of the uterus wall during a menstrual cycle. day of the menstrual cycle thickness of uterus wall lining Which day is the last day of menstruation?
Which name is given to different versions of a gene?
The diagram shows the cells of a mammalian embryo shortly after fertilisation. What is the correct description of these cells?
The diagram shows the inheritance, in one family, of a sex-linked recessive disease. unaffected female affected female unaffected male affected male key Which individuals in the diagram are heterozygous for this disease?
Which row describes continuous and discontinuous variation? continuous variation discontinuous variation
Which statements describe an adaptive feature in an organism? It helps an organism to survive and reproduce in its environment. It always shows continuous variation. It is inherited.
The graph shows the change in the percentage of bacteria resistant to antibiotic X. time percentage of bacteria resistant to antibiotic X What causes the change shown in the graph?
The diagram shows the flow of energy, in units of energy, through a food chain. producers 1000 units primary consumers 100 units secondary consumers 10 units tertiary consumers 1 unit Which percentage of energy is lost between the producers and secondary consumers?
Which process in the nitrogen cycle can be caused by lightning and bacteria?
Which phase in the population growth curve shows when death rates are higher than birth rates? number of organisms time
What is a disadvantage of large-scale monocultures of crop plants?
Some processes involved in the production of human insulin by genetic modification are listed. insertion of the human insulin gene DNA into a cut bacterial plasmid bacteria containing recombinant plasmids multiply and make human insulin human insulin gene DNA is isolated using restriction enzymes recombinant plasmids are inserted into bacteria What is the sequence of these processes in genetic modification?