The process of life 0.0 / 5 ? BiologyChemical reactions in living thingsHow plants make foodObtaining energyGCSEOCR Created by: 10swalkersCreated on: 15-04-15 10:31 In the phrase 'MRS GREN', what does the 'M' stand for? Movement. 1 of 15 Which statement describes the job of an enzyme? The job of an enzyme is to speed up chemical reactions. 2 of 15 Which of the following needs to be constant for enzymes to work? Temperature. 3 of 15 Rates of reaction increase as the temperature increases. This is because molecules: Move faster and have more collisions. 4 of 15 What effect does a very high temperature have on an enzyme? Very high temperature stops an enzyme from working. 5 of 15 What is the name of the chemical that absorbs light energy? Chlorophyll. 6 of 15 What are the products of photosynthesis? Glucose and oxygen. 7 of 15 What is the job of cytoplasm in a plant cell? Produces proteins. 8 of 15 What is diffusion? The movement of particles from a region of high concentration to a region of low concentration. 9 of 15 Tomatoes in a greenhouse grow faster if the carbon dioxide concentration is increased. This shows that: Carbon dioxide concentration must have been a limiting factor. 10 of 15 Aerobic respiration requires: Oxygen. 11 of 15 What is the word equation for aerobic respiration? Glucose + oxygen → carbon dioxide + water (+ energy) 12 of 15 When is an animal likely to use anaerobic respiration? When being chased by a predator. 13 of 15 What is the function of a molecule of circular DNA in a bacteria cell? DNA contains the genetic code for enzymes involved in respiration. 14 of 15 What occurs during the process of 'fermentation'? Fermentation involves sugars being converted into alcohols such as bioethanol. 15 of 15
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