B4 Quiz Based on the grade booster checklist in my revision guide 4.0 / 5 based on 3 ratings ? BiologyB4GCSEOCR Created by: JennLousieCreated on: 30-03-16 12:25 What is respiration? The release of energy from food 1 of 23 What does respiration do? It provides energy for things like growth and movement 2 of 23 What does photosynthesis do? Make food and energy available to the rest of the food chain 3 of 23 What are enzymes? Proteins that speed up chemical reactions 4 of 23 What two things do all enzymes have? Optimum temperature and pH 5 of 23 What does aerobic respiration require? Oxygen 6 of 23 When does anaerobic respiration take place? When there's a lack of oxygen 7 of 23 What does the cell membrane do? Regulates what enters and leaves cells 8 of 23 How do oxygen and carbon dioxide move around cells? They move in and out by diffusion 9 of 23 Where are enzymes assembled? In the cytoplasm 10 of 23 What are enzymes assembled from? Instructions in the genes 11 of 23 What does an enzyme work with? Only one type of substrate 12 of 23 What is the mechanism for an enzyme substrate complex called? Lock and key mechanism 13 of 23 What happens to enzyme activity as the temperature increases? It increases up to a point 14 of 23 What absorbs the energy for photosynthesis? The chemical chlorophyll in chloroplasts 15 of 23 What are the products of photosynthesis? Glucose and oxygen 16 of 23 What is diffusion? The movement of molecules from an area of high to low concentration 17 of 23 What is osmosis? A special form of diffusion only involving water 18 of 23 How is water moved into plant roots? Osmosis 19 of 23 Does anaerobic or aerobic respiration produce more energy? Aerobic 20 of 23 What can high temperatures and extreme pHs do to enzymes? Denature them 21 of 23 What does active transport use? Energy 22 of 23 Why is active transport needed? Plant roots need it to get nitrates from the soil 23 of 23
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