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AQA GCSE Biology B2. Aerobic Respiration and Anaerobic Respiration Questions and Answers Graded A+
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AQA GCSE Biology B2. Aerobic Respiration and Anaerobic Respiration
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AQA GCSE Biology B2. AerobicRespiration and Anaerobic Respiration
What types of molecules control the rate of reactions inside a cell? - answer Enzymes
What is the word equation for aerobic respiration? - answer Glucose + Oxygen ---------
Water + Carbon Dioxide(Energy)
What part of the cell do most stages of aerobic respiration take place in? - answer
Mitochondria.
Why does anaerobic respiration release so much less energy than aerobic respiration? -
answer Anaerobic respiration is the incomplete breakdown of glucose.
What is the product of anaerobic respiration? - answer Lactic Acid.
What is meant by 'Oxygen debt'? - answer The amount of oxygen required to oxidize
lactic acid to carbon dioxide and water.
Why do muscle cells have lots of mitochondria? - answer They need to respire lots of
produce enough energy for contraction.
What happens to muscles when they are subject to long periods of vigorous activity and
why? - answer They become fatigued as the build up of lactic acid stops enzymes
working.
Why do athletes 'carb load' before a big race? - answer To increase stores of glycogen
in their muscles.
Can be converted back to glucose to be used for respiration during the race.
What do plants use the energy from respiration for? - answer To build up sugars,
nitrates and other nutrients into amino acids which are then built up into proteins.
When does anaerobic respiration take place? - answer When there is insufficient
oxygen supply.
What can the energy released in respiration be used for? - answer Contraction of
muscles.
Keeping a stable body temperature.
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