Proteins, catalysts and enzymes 2.0 / 5 based on 1 rating ? BiologyEnzymes and digestionGCSEAQA Created by: BunterCreated on: 30-04-13 20:26 What are protein molecules made up of? Long chains of small units called amino acids 1 of 8 What do proteins do in the body? They act as structural components, Hormones, Antibodies, Catalysts 2 of 8 What is a catalyst? A substance which speeds up a chemical reaction. At the end of the reaction the catalyst remains chemically unchanged. 3 of 8 What controls chemical reaction rates in the body? Enzymes 4 of 8 What are enzymes? A protein molecule that acts as a biological catalyst 5 of 8 What is an active site? The site on a enzyme where the reactants bind 6 of 8 What are enzymes involved in? Building Large molecules from lots of smaller one, Changing one molecule into another, Breaking down large molecules into smaller ones 7 of 8 What are subtrates? The material or chemical on which an enzyme acts 8 of 8
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