Biology:Life Processes 0.0 / 5 ? BiologyLife ProcessesIGCSEEdexcel Created by: xmayax2Created on: 10-10-17 18:42 What are the seven life processes which are common to most living things? (MRS GREN) 1. Movement 2. Respiration 3. Sensitivity 4. Growth 5. Reproduction 6. Excretion 7. Nutrition 1 of 15 What does the Cytoplasm do? It makes up the cell 2 of 15 What does the nucleus do? It controls the activities of the cell 3 of 15 What does the cell membrane do? It controls which substances pass in either direction. 4 of 15 What does the mitochondria do? They carry out some of the reactions of respiration 5 of 15 What does the cell wall do? It holds the cell together (because its made of a tough material called cellulose) 6 of 15 What do the chloroplasts do? They absorb light energy to make food in the process of photosynthesis. 7 of 15 What are enzymes and what do they do? They are biological catalysts that speed up the process of living things. 8 of 15 Why do we need enzymes? Without them things would go too slow for life to go on. 9 of 15 What is the active site of an enzyme? The region on an enzyme that allows a reaction to occur. 10 of 15 What is the optimum temperature for an enzyme? 37C 11 of 15 What are some properties of enzymes? They are always proteins, they are specific in their actions, they are reusable, they can be destroyed by heat, they are sensative to pH. 12 of 15 What is cell respiration? When a cell breaks down food molecules to release stored chemical energy. 13 of 15 What can chemical energy be used for? Contraction of muscle cells, active transport of molecules, building large molecules and cell division. 14 of 15 What is aerobic respiration? respiration using oxygen 15 of 15
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