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glucose. The correct molecule is ATP, which transfers energy to processes requiring it."},{"text":"Haemoglobin.","correct":false,"explanation":"Haemoglobin transports oxygen in red blood cells but does not receive energy from glucose. ATP is the molecule that carries transferred energy for cell activities."},{"text":"Starch.","correct":false,"explanation":"Starch is a storage carbohydrate and is not the cell’s immediate energy-transfer molecule. Energy released from glucose is transferred to ATP during respiration."}]},{"id":"a823608d-6b3b-4168-8f91-a7a95b3fa9ed","cardType":"basic","points":1,"front":"What does ATP stand for?","back":"Adenosine triphosphate.","mcqOptions":[{"text":"Adenosine triphosphate.","correct":true,"explanation":"ATP is the abbreviation for adenosine triphosphate, the molecule used to transfer energy for cellular activities."},{"text":"Adenine three-phosphate.","correct":false,"explanation":"The name refers to adenosine, not simply adenine, and triphosphate describes three phosphate groups. The correct expansion is adenosine triphosphate."},{"text":"Activated transport protein.","correct":false,"explanation":"ATP is not a transport protein. Its full name is adenosine triphosphate, referring to its adenosine and three phosphate groups."},{"text":"Anaerobic transfer process.","correct":false,"explanation":"ATP does not stand for a respiration process. It means adenosine triphosphate, the energy-transfer molecule produced during respiration."}]},{"id":"7e783346-91f0-4552-be5f-8ee7290f2ac9","cardType":"basic","points":2,"front":"Why is ATP useful as a cell energy supply?","back":"It releases small, manageable amounts of energy where needed.","mcqOptions":[{"text":"It releases small, manageable amounts of energy where needed.","correct":true,"explanation":"ATP releases energy in small, manageable amounts, allowing cells to control and use it efficiently exactly where it is needed."},{"text":"It releases large, uncontrollable amounts of energy throughout the cell.","correct":false,"explanation":"Large, uncontrollable energy releases would waste energy and damage cell processes. ATP is useful because it releases small, manageable amounts where needed."},{"text":"It stores all, long-term amounts of energy inside the nucleus.","correct":false,"explanation":"ATP is not a long-term energy store and is not confined to the nucleus. It releases small, manageable amounts of energy where needed."},{"text":"It releases small, unusable amounts of energy outside the cell.","correct":false,"explanation":"ATP releases usable energy inside cells, not outside them. Its usefulness comes from providing small, manageable amounts where cellular work is occurring."}]},{"id":"1fd4b65f-0d62-4690-ad78-0e3b0434ca8e","cardType":"cloze","points":null,"front":"[ ] moves air in and out of lungs; [ ] is a chemical reaction inside cells.","back":"Breathing moves air in and out of lungs; respiration is a chemical reaction inside cells.","mcqOptions":[{"text":"Breathing moves air in and out of lungs; respiration is a chemical reaction inside cells.","correct":true,"explanation":"Breathing is the physical movement of air into and out of the lungs, whereas respiration is the chemical reaction that releases energy inside cells."},{"text":"Respiration moves air in and out of lungs; breathing is a chemical reaction inside cells.","correct":false,"explanation":"These definitions are reversed. Breathing moves air in and out of the lungs, while respiration is the chemical reaction inside cells that releases energy."},{"text":"Ventilation moves air in and out of lungs; digestion is a chemical reaction inside cells.","correct":false,"explanation":"Ventilation can describe moving air, but digestion breaks down food and is not the cellular energy-release reaction. The correct pair is breathing and respiration."},{"text":"Diffusion moves air in and out of lungs; breathing is a chemical reaction inside cells.","correct":false,"explanation":"Diffusion moves particles down concentration gradients and does not move air in and out of the lungs as a whole. Respiration is the chemical reaction inside cells."}]},{"id":"1a85c489-3757-490f-8cb7-ea7442934234","cardType":"basic","points":1,"front":"Where does most aerobic respiration occur in plant and animal cells?","back":"In the mitochondria.","mcqOptions":[{"text":"In the mitochondria.","correct":true,"explanation":"Most aerobic respiration occurs in mitochondria, which contain the enzymes and structures needed for the later stages of aerobic respiration."},{"text":"In the ribosomes.","correct":false,"explanation":"Ribosomes make proteins by joining amino acids; they are not the main site of aerobic respiration. Most aerobic respiration occurs in mitochondria."},{"text":"In the chloroplasts.","correct":false,"explanation":"Chloroplasts carry out photosynthesis in plant cells, not most aerobic respiration. Aerobic respiration mainly occurs in mitochondria in plant and animal cells."},{"text":"In the nucleus.","correct":false,"explanation":"The nucleus contains genetic material and controls cell activities, but it is not the main site of aerobic respiration. That role belongs to mitochondria."}]},{"id":"dd045bc3-e981-42c4-be31-3f80d05f6354","cardType":"cloze","points":null,"front":"Aerobic respiration uses [ ] to release energy from [ ].","back":"Aerobic respiration uses oxygen to release energy from glucose.","mcqOptions":[{"text":"Aerobic respiration uses oxygen to release energy from glucose.","correct":true,"explanation":"Aerobic respiration requires oxygen and breaks down glucose, transferring the released energy to ATP for use by the cell."},{"text":"Aerobic respiration uses carbon dioxide to release energy from glucose.","correct":false,"explanation":"Carbon dioxide is a product of aerobic respiration, not the reactant used to release energy from glucose. Oxygen is required for this process."},{"text":"Aerobic respiration uses oxygen to release energy from starch.","correct":false,"explanation":"Starch must first be digested into glucose before it can provide the substrate for respiration. The equation describes oxygen releasing energy from glucose."},{"text":"Aerobic respiration uses water to release energy from glucose.","correct":false,"explanation":"Water is produced in aerobic respiration rather than used as its oxygen source. Oxygen is the reactant that enables energy to be released from glucose."}]},{"id":"d31418aa-7bb2-4afa-bbc2-7dfd7870ab81","cardType":"basic","points":2,"front":"What is the word equation for aerobic respiration?","back":"glucose + oxygen → carbon dioxide + water (+ ATP).","mcqOptions":[{"text":"glucose + oxygen → carbon dioxide + water (+ ATP).","correct":true,"explanation":"Aerobic respiration uses glucose and oxygen as reactants and produces carbon dioxide and water, with energy transferred to ATP."},{"text":"glucose + carbon dioxide → oxygen + water (+ ATP).","correct":false,"explanation":"This reverses the reactants and products. Aerobic respiration uses glucose and oxygen, producing carbon dioxide and water while transferring energy to ATP."},{"text":"carbon dioxide + water → glucose + oxygen (+ ATP).","correct":false,"explanation":"This is the word equation for photosynthesis in the wrong context, not respiration. Respiration breaks down glucose using oxygen to form carbon dioxide and water."},{"text":"glucose → lactic acid + carbon dioxide (+ ATP).","correct":false,"explanation":"This describes an incorrect anaerobic equation and omits oxygen. Aerobic respiration uses oxygen and produces carbon dioxide and water from glucose."}]},{"id":"91068332-0f46-48ea-83bb-f6fb69deca10","cardType":"basic","points":2,"front":"What is the balanced symbol equation for aerobic respiration?","back":"$$\\mathrm{C_6H_{12}O_6} + 6\\mathrm{O_2} \\to 6\\mathrm{CO_2} + 6\\mathrm{H_2O}$","mcqOptions":[{"text":"$$\\mathrm{C_6H_{12}O_6} + 6\\mathrm{O_2} \\to 6\\mathrm{CO_2} + 6\\mathrm{H_2O}$","correct":true,"explanation":"There are six carbon, twelve hydrogen and eighteen oxygen atoms on each side, so the equation is balanced and correctly represents aerobic respiration."},{"text":"$$\\mathrm{C_6H_{12}O_6} + 3\\mathrm{O_2} \\to 6\\mathrm{CO_2} + 6\\mathrm{H_2O}$","correct":false,"explanation":"The coefficient for oxygen is too small: this gives only twelve oxygen atoms on the left but eighteen on the right. Six oxygen molecules are required."},{"text":"$$\\mathrm{C_6H_{12}O_6} + 6\\mathrm{O_2} \\to 3\\mathrm{CO_2} + 6\\mathrm{H_2O}$","correct":false,"explanation":"Halving the carbon dioxide coefficient leaves only three carbon atoms among the products, compared with six in glucose. Six carbon dioxide molecules are required."},{"text":"$$\\mathrm{C_6H_{12}O_6} + 6\\mathrm{O_2} \\to 6\\mathrm{CO_2} + 12\\mathrm{H_2O}$","correct":false,"explanation":"The water coefficient has been doubled, creating twenty-four hydrogen atoms on the products side instead of twelve. Six water molecules balance the hydrogen atoms."}]},{"id":"e22146e0-133a-4b69-8b51-0b2bb937b6f2","cardType":"basic","points":2,"front":"Why does aerobic respiration release a large amount of ATP?","back":"Glucose is completely broken down using oxygen.","mcqOptions":[{"text":"Glucose is completely broken down using oxygen.","correct":true,"explanation":"With oxygen available, glucose is completely broken down, transferring more of its chemical energy into ATP than partial breakdown during anaerobic respiration."},{"text":"Glucose is partly broken down using oxygen.","correct":false,"explanation":"Partial breakdown is characteristic of anaerobic respiration, so less energy is transferred to ATP. Aerobic respiration releases much ATP because glucose is completely broken down using oxygen."},{"text":"Glucose is completely broken down without oxygen.","correct":false,"explanation":"Lack of oxygen prevents aerobic respiration rather than explaining its high ATP yield. Aerobic respiration releases much ATP because glucose is completely broken down using oxygen."},{"text":"Glucose is completely broken down using carbon dioxide.","correct":false,"explanation":"Carbon dioxide is a product of aerobic respiration, not the substance that enables complete glucose breakdown. Oxygen allows glucose to be completely broken down and produces a large ATP yield."}]},{"id":"bb8814f5-d2f3-49df-a874-64d57297afcb","cardType":"cloze","points":null,"front":"Anaerobic respiration releases energy from glucose [ ].","back":"Anaerobic respiration releases energy from glucose without oxygen.","mcqOptions":[{"text":"without oxygen","correct":true,"explanation":"Anaerobic respiration occurs when oxygen is unavailable, so glucose is broken down and energy is released without oxygen being used."},{"text":"with oxygen","correct":false,"explanation":"Using oxygen describes aerobic respiration, not anaerobic respiration. Anaerobic respiration releases energy from glucose when oxygen is unavailable."},{"text":"without carbon dioxide","correct":false,"explanation":"Carbon dioxide is not the defining missing reactant in anaerobic respiration. The process releases energy from glucose without oxygen."},{"text":"in the mitochondria","correct":false,"explanation":"The location of respiration does not complete this sentence or define anaerobic respiration. Its distinguishing feature is releasing energy from glucose without oxygen."}]},{"id":"6d3c67e1-2240-4bd8-a432-0364b3529c7c","cardType":"basic","points":2,"front":"Why does anaerobic respiration release much less ATP than aerobic respiration?","back":"Glucose is only partly broken down.","mcqOptions":[{"text":"Glucose is only partly broken down.","correct":true,"explanation":"Anaerobic respiration stops glucose being fully oxidised, so less of its chemical energy is transferred into ATP than during aerobic respiration."},{"text":"Glucose is completely broken down.","correct":false,"explanation":"Complete breakdown would release more energy, not much less, and is associated with aerobic respiration. Anaerobic respiration releases less ATP because glucose is only partly broken down."},{"text":"Glucose is completely broken down using oxygen.","correct":false,"explanation":"Oxygen allows aerobic respiration and a higher ATP yield, so this statement gives the opposite explanation. Anaerobic respiration involves glucose being only partly broken down."},{"text":"Less glucose is partly broken down.","correct":false,"explanation":"The amount of glucose is not the key difference between the pathways. Anaerobic respiration releases less ATP because each glucose molecule is only partly broken down."}]},{"id":"9d6b645e-75d2-4116-854c-0e8e244881c6","cardType":"basic","points":1,"front":"What product forms during anaerobic respiration in animal cells?","back":"Lactic acid.","mcqOptions":[{"text":"Lactic acid.","correct":true,"explanation":"Animal muscle cells convert pyruvate into lactic acid during anaerobic respiration, allowing glycolysis to continue when oxygen supply is insufficient."},{"text":"Ethanol.","correct":false,"explanation":"Ethanol is produced by anaerobic respiration in plants and yeast, not animal muscle cells. Animal cells produce lactic acid in anaerobic conditions."},{"text":"Carbon dioxide.","correct":false,"explanation":"Carbon dioxide is released during anaerobic respiration in plants and yeast, but not as the main product in animal cells. Animal cells form lactic acid."},{"text":"Water.","correct":false,"explanation":"Water is associated with aerobic respiration when oxygen acts as the final electron acceptor. Anaerobic respiration in animal cells produces lactic acid instead."}]},{"id":"62bb02a7-236a-4b03-bf3f-8ba4e6d0e287","cardType":"basic","points":1,"front":"What effect can lactic acid have in muscles?","back":"It can cause muscle fatigue.","mcqOptions":[{"text":"It can cause muscle fatigue.","correct":true,"explanation":"Lactic acid accumulation is associated with muscle fatigue, reducing the muscles’ ability to contract effectively during strenuous exercise."},{"text":"It can cause increased muscle strength.","correct":false,"explanation":"Lactic acid is linked with reduced muscle performance, not improved strength. Its accumulation during anaerobic respiration can contribute to muscle fatigue."},{"text":"It can cause increased oxygen supply.","correct":false,"explanation":"Lactic acid does not increase oxygen delivery to muscles. During vigorous exercise, its accumulation is associated with muscle fatigue."},{"text":"It can cause muscle contraction.","correct":false,"explanation":"Muscle contraction is the normal function of muscle, whereas lactic acid accumulation is linked to reduced performance. The recognised effect is muscle fatigue."}]},{"id":"9ed9bfe8-3536-45df-8944-10a90cb8f580","cardType":"cloze","points":null,"front":"During vigorous exercise, muscles may respire anaerobically because ATP demand exceeds [ ].","back":"During vigorous exercise, muscles may respire anaerobically because ATP demand exceeds oxygen supplied by the blood.","mcqOptions":[{"text":"oxygen supplied by the blood","correct":true,"explanation":"During vigorous exercise, oxygen delivery cannot meet the muscles’ ATP demand. Anaerobic respiration therefore supplements aerobic respiration when oxygen supplied by the blood is insufficient."},{"text":"glucose supplied by the blood","correct":false,"explanation":"Glucose supply is not normally the limiting factor described here. Anaerobic respiration begins when ATP demand exceeds the oxygen supplied by the blood."},{"text":"carbon dioxide removed by the blood","correct":false,"explanation":"Carbon dioxide removal is a separate transport issue and does not directly explain the switch to anaerobic respiration. The limiting factor is oxygen supply."},{"text":"energy supplied by the blood","correct":false,"explanation":"ATP is produced inside muscle cells rather than supplied by the blood. Anaerobic respiration is needed when oxygen supplied by the blood cannot meet demand."}]},{"id":"bbb08a37-11c6-43f2-bf2e-16105d30edbf","cardType":"basic","points":1,"front":"What products form during anaerobic respiration in plants and yeast?","back":"Ethanol and carbon dioxide.","mcqOptions":[{"text":"Ethanol and carbon dioxide.","correct":true,"explanation":"In plants and yeast, anaerobic respiration converts glucose into ethanol and carbon dioxide, releasing a small amount of ATP without oxygen."},{"text":"Lactic acid and oxygen.","correct":false,"explanation":"Lactic acid is the anaerobic product in animal cells, while plants and yeast produce ethanol and carbon dioxide. Oxygen is not a product of this pathway."},{"text":"Ethanol and oxygen.","correct":false,"explanation":"Ethanol is correctly identified, but oxygen is not formed by anaerobic respiration. The products in plants and yeast are ethanol and carbon dioxide."},{"text":"Water and carbon dioxide.","correct":false,"explanation":"Water and carbon dioxide do not describe anaerobic respiration in plants and yeast. The characteristic products are ethanol and carbon dioxide."}]},{"id":"5bc2871e-d4fd-4762-9fed-654175b82f84","cardType":"cloze","points":null,"front":"Anaerobic respiration in plants and yeast is also called [ ].","back":"Anaerobic respiration in plants and yeast is also called fermentation.","mcqOptions":[{"text":"fermentation","correct":true,"explanation":"Fermentation is the name commonly used for anaerobic respiration in plants and yeast, where glucose is broken down without oxygen."},{"text":"aerobic respiration","correct":false,"explanation":"Aerobic respiration requires oxygen, whereas fermentation describes anaerobic respiration in plants and yeast. The two pathways are not interchangeable."},{"text":"photosynthesis","correct":false,"explanation":"Photosynthesis uses light energy to make glucose from carbon dioxide and water; it is not anaerobic respiration. The correct term is fermentation."},{"text":"oxygen debt","correct":false,"explanation":"Oxygen debt describes a period after exercise when extra oxygen is needed, not anaerobic respiration in plants and yeast. That process is called fermentation."}]},{"id":"4bcad627-0e40-41aa-9c9a-309a6cc35dd9","cardType":"basic","points":1,"front":"Which product of yeast fermentation makes bread dough rise?","back":"Carbon dioxide.","mcqOptions":[{"text":"Carbon dioxide.","correct":true,"explanation":"Yeast produces carbon dioxide during anaerobic respiration. Bubbles of this gas become trapped in the dough, causing it to expand and rise."},{"text":"Ethanol.","correct":false,"explanation":"Ethanol is also produced during yeast fermentation, but it does not form the bubbles that expand bread dough. Carbon dioxide is the product that makes dough rise."},{"text":"Lactic acid.","correct":false,"explanation":"Lactic acid is associated with anaerobic respiration in animal muscle cells, not yeast fermentation in bread-making. Yeast releases carbon dioxide, which becomes trapped in the dough."},{"text":"Oxygen.","correct":false,"explanation":"Oxygen is consumed during aerobic respiration rather than released by yeast fermentation. Carbon dioxide gas forms bubbles that make the bread dough rise."}]},{"id":"95d5dd62-de09-4db2-9513-57920bda159a","cardType":"basic","points":1,"front":"In the seed practical, what does “evolution of carbon dioxide” mean?","back":"Carbon dioxide is produced and released.","mcqOptions":[{"text":"Carbon dioxide is produced and released.","correct":true,"explanation":"In biology, evolution of a gas means that the gas is formed and given off. Respiring seeds therefore produce carbon dioxide and release it into their surroundings."},{"text":"Carbon dioxide is absorbed and used.","correct":false,"explanation":"Absorption and use would describe carbon dioxide uptake during photosynthesis, not its evolution. Evolution means carbon dioxide is produced and released by the respiring seeds."},{"text":"Carbon dioxide is dissolved and stored.","correct":false,"explanation":"Dissolving carbon dioxide does not explain the term “evolution”, which refers to a gas being generated and given off. The seeds produce and release carbon dioxide during respiration."},{"text":"Carbon dioxide is converted into oxygen.","correct":false,"explanation":"Conversion into oxygen is a misconception based on photosynthesis and does not occur during respiration. Evolution means that carbon dioxide is produced and released."}]},{"id":"26593747-1d66-4948-823a-1a753be9f26f","cardType":"basic","points":2,"front":"Why are germinating seeds useful for respiration investigations?","back":"They are growing, so they respire rapidly to make ATP.","mcqOptions":[{"text":"They are growing, so they respire rapidly to make ATP.","correct":true,"explanation":"Germination requires energy for growth, cell division and active transport. The seeds therefore respire rapidly, producing measurable changes such as carbon dioxide release or temperature increase."},{"text":"They are growing, so they photosynthesise rapidly to make glucose.","correct":false,"explanation":"Germinating seeds use stored food and often lack developed leaves, so rapid photosynthesis is not the reason for using them. They respire rapidly to make ATP for growth."},{"text":"They are inactive, so they respire very slowly to save energy.","correct":false,"explanation":"Dormant seeds have a low metabolic rate and would produce smaller changes in an investigation. Germinating seeds are useful because they respire rapidly to make ATP."},{"text":"They are growing, so they ferment continuously to make ethanol.","correct":false,"explanation":"Germinating seeds normally use aerobic respiration when oxygen is available, rather than fermenting continuously. Their rapid respiration supplies the ATP needed for growth."}]},{"id":"4a53fbdc-2e1b-4ef7-9a1f-68c65ce8ddee","cardType":"cloze","points":null,"front":"When carbon dioxide increases, hydrogen carbonate indicator changes from red/orange towards [ ], while limewater turns [ ].","back":"When carbon dioxide increases, hydrogen carbonate indicator changes from red/orange towards yellow, while limewater turns cloudy or milky.","mcqOptions":[{"text":"When carbon dioxide increases, hydrogen carbonate indicator changes from red/orange towards yellow, while limewater turns cloudy or milky.","correct":true,"explanation":"Extra carbon dioxide makes hydrogen carbonate indicator more acidic, changing it towards yellow. Carbon dioxide also reacts with limewater to form a white precipitate, making it cloudy or milky."},{"text":"When carbon dioxide increases, hydrogen carbonate indicator changes from red/orange towards purple, while limewater turns cloudy or milky.","correct":false,"explanation":"Purple indicates a decrease in carbon dioxide, not an increase. Increased carbon dioxide turns hydrogen carbonate indicator yellow, while limewater becomes cloudy or milky."},{"text":"When carbon dioxide increases, hydrogen carbonate indicator changes from red/orange towards yellow, while limewater turns clear.","correct":false,"explanation":"Although the indicator correctly changes towards yellow, limewater does not remain clear when carbon dioxide is present. A calcium carbonate precipitate makes it cloudy or milky."},{"text":"When carbon dioxide increases, hydrogen carbonate indicator changes from red/orange towards red/orange, while limewater turns colourless.","correct":false,"explanation":"Red/orange represents normal atmospheric carbon dioxide rather than an increase, and limewater should become cloudy. Increased carbon dioxide changes the indicator towards yellow and limewater towards cloudy or milky."}]},{"id":"48773b58-8fd1-49a0-88ef-eeee5da82809","cardType":"basic","points":2,"front":"Why use boiled seeds or glass beads as a control?","back":"To show CO2 or heat comes from living respiration, not apparatus.","mcqOptions":[{"text":"To show CO2 or heat comes from living respiration, not apparatus.","correct":true,"explanation":"Boiled seeds are dead and glass beads do not respire, so they provide a non-living comparison. Any additional carbon dioxide or heat from germinating seeds is due to living respiration."},{"text":"To show CO2 or heat comes from active photosynthesis, not apparatus.","correct":false,"explanation":"The experiment investigates respiration rather than photosynthesis, and seeds may not have photosynthetic tissue. The control shows that carbon dioxide or heat comes from living respiration, not the apparatus."},{"text":"To show CO2 or heat comes from boiled seed respiration, not apparatus.","correct":false,"explanation":"Boiling kills seeds and stops their enzyme-controlled respiration, so they should not release substantial respiratory heat or carbon dioxide. The control identifies living respiration as the source."},{"text":"To show CO2 or heat comes from glass bead metabolism, not apparatus.","correct":false,"explanation":"Glass beads provide a non-living comparison and cannot respire. The purpose is to show that carbon dioxide or heat is produced by living respiration rather than by the apparatus."}]},{"id":"80f14748-ef37-4b19-8368-a39d37511744","cardType":"basic","points":2,"front":"What result shows germinating seeds release heat by respiration?","back":"The germinating seed flask shows a temperature rise; control shows little/no rise.","mcqOptions":[{"text":"The germinating seed flask shows a temperature rise; control shows little/no rise.","correct":true,"explanation":"Respiration is exothermic, so actively respiring germinating seeds release thermal energy and warm their flask. Little or no increase in the control rules out environmental or apparatus effects."},{"text":"The germinating seed flask shows a temperature fall; control shows little/no fall.","correct":false,"explanation":"A temperature fall does not demonstrate heat release and could reflect cooling to the surroundings. Respiration is shown by a temperature rise in the germinating seeds but little or none in the control."},{"text":"The germinating seed flask shows a temperature rise; control shows the same rise.","correct":false,"explanation":"If both flasks warmed equally, the change could be caused by the surroundings rather than respiration. Evidence requires a temperature rise in the germinating seed flask but little or none in the control."},{"text":"The germinating seed flask shows no temperature change; control shows a large rise.","correct":false,"explanation":"No change in the germinating seed flask would provide no evidence of released heat. A temperature rise there, alongside little or no rise in the control, supports heat production by respiration."}]},{"id":"f92e2610-080c-44b5-9091-00af7fa35337","cardType":"cloze","points":null,"front":"Rate of temperature increase = [ ] ÷ [ ].","back":"Rate of temperature increase = temperature change ÷ time.","mcqOptions":[{"text":"Rate of temperature increase = temperature change ÷ time.","correct":true,"explanation":"A rate measures change per unit time. Dividing the measured temperature change by the elapsed time gives the average rate of temperature increase."},{"text":"Rate of temperature increase = time ÷ temperature change.","correct":false,"explanation":"Reversing the division gives time per unit temperature rather than temperature change per unit time. The rate is temperature change divided by time."},{"text":"Rate of temperature increase = temperature change ÷ mass.","correct":false,"explanation":"Dividing by mass could standardise heat production between different quantities of seeds, but it does not calculate temperature increase per unit time. Divide temperature change by time."},{"text":"Rate of temperature increase = final temperature ÷ time.","correct":false,"explanation":"Using the final temperature ignores the starting temperature and therefore overstates the change. Subtract the initial temperature first, then divide that temperature change by time."}]}]}],"examCountdown":{"examDate":"2027-05-11","paperLabel":"Paper 1"},"heading":"Respiration","title":"Respiration Flashcards","topbar":{"backHref":"/igcse/biology/edexcel/flashcards"},"topicSidebar":"$L36"}]}],"topicId":"f1830cfe-ce88-5e02-83aa-4dd93ccdcdc7","walled":"$L37"}],"$L38","$L39"]