B4 Key Words 0.0 / 5 ? BiologyB4GCSEOCR Created by: Natalie45Created on: 16-05-15 10:50 Active Site The part of the enzyme which the reacting molecules fit into 1 of 17 Active Transport The use of energy to move molecules in and out of a cell. This is faster than diffusion and can work from low to high concentration 2 of 17 Aerobic Respiration Respiration using oxygen 3 of 17 Amino Acids Small molecules that are from proteins when joined together in long chains. 4 of 17 Anaerobic Respiration Respiration without oxygen 5 of 17 Catalyst A substance that increases the rate of chemical reactions without being chemically changed itself 6 of 17 Cellulose The molecule that makes up fibre. It can not be digested by the human digestive system. 7 of 17 Chlorophyll A part of a plant cell that contains chlorophyll 8 of 17 Cytoplasm The material within a cell (not including the nucleus) 9 of 17 Denatured When enzymes are denatured the structure and shape of the active site has changed 10 of 17 Diffusion Movement of molecules from a high concentration to a low concentration 11 of 17 Enzyme Speeds up chemical reactions 12 of 17 Fermentation The conversion of carbohydrates to alcohols and CO2 or organic acids using yeast or bacteria 13 of 17 Lock and Key Molecules have a specific shape that fits the active site of an enzyme 14 of 17 Limiting Factor The factor preventing the rate of photosynthesis from increasing in a particular situation. 15 of 17 Mitochrondria The parts of a cell where respiration take place 16 of 17 Osmosis The diffusion of water across a partially permeable membrane 17 of 17
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