Biology Unit 3 A short quiz for students doing the AQA Biology unit 3 exam :) 3.5 / 5 based on 7 ratings ? BiologyGCSEAQA Created by: izzah asifCreated on: 14-04-12 13:52 Where does the energy required for active transport come from? cellular respiration 1 of 18 What happens to the diaphragm when you breath in? Flattens 2 of 18 Where in the body does Carbon dioxide leave the blood? alveoli 3 of 18 Roughly, what percentage of the air you breath in is Nitrogen? 80% 4 of 18 Roughly what percentage of the air you breathe in is Carbon Dioxide? 0.04% 5 of 18 What structures increase the surface area of the small intestines? Villi 6 of 18 What allows carbon dioxide to enter a plant? stomata 7 of 18 The loss of water from the surface of their leaves is known as... Transpiration 8 of 18 What happens to a plant when there is too little water? It Wilts 9 of 18 During exercise the arteries... dilate 10 of 18 Anaerobic respiration is the ___________ breakdown of glucose incomplete 11 of 18 Bacteria is used to make... Cheese 12 of 18 Who discovered penicillin? Alexander Flemming 13 of 18 What is hops added when making beer? For flavour 14 of 18 When brewing beer and making wine, the starch used is broken down into glucose, what substance breaks it down? enzymes 15 of 18 When making yogurt, what causes the lactose (milk sugar) to clot? lactic acid 16 of 18 The main gas in biogas is... Carbon dioxide 17 of 18 What is the maximum temperature which is allowed for schools to grow bacteria at? 25 degrees C 18 of 18
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