B4 Key Words 0.0 / 5 ? BiologyRespiration and exercisePhotosynthesis and transpirationCells, tissues and organsEnzymes and digestionGCSEOCR Created by: Natalie45Created on: 16-05-15 13:27 Active Site The part of the enzyme which the reacting molecules fit into 1 of 20 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 20 Aerobic Respiration Respiration using oxygen 3 of 20 Amino Acids Small molecules that are from proteins when joined together in long chains. 4 of 20 Anaerobic Respiration Respiration without oxygen 5 of 20 Catalyst A substance that increases the rate of chemical reactions without being chemically changed itself 6 of 20 Cellulose The molecule that makes up fibre. It can not be digested by the human digestive system. 7 of 20 Chlorophyll A part of a plant cell that contains chlorophyll 8 of 20 Cytoplasm The material within a cell (not including the nucleus) 9 of 20 Denatured When enzymes are denatured the structure and shape of the active site has changed 10 of 20 Diffusion Movement of molecules from a high concentration to a low concentration 11 of 20 Enzyme Speeds up chemical reactions 12 of 20 Fermentation The conversion of carbohydrates to alcohols and CO2 or organic acids using yeast or bacteria 13 of 20 Lock and Key Molecules have a specific shape that fits the active site of an enzyme 14 of 20 Limiting Factor The factor preventing the rate of photosynthesis from increasing in a particular situation. 15 of 20 Mitochrondria The parts of a cell where respiration take place 16 of 20 Osmosis The diffusion of water across a partially permeable membrane 17 of 20 Partially Permeable Membrane A membrane which allows some molecules to diffuse out but is a barrier to other molecules 18 of 20 Respiration Chemical reaction which releases energy in cells 19 of 20 Photosynthesis A chemical reaction providing energy for plants. The plant uses sunlight to convert carbon dioxide and water into glucose and oxygen 20 of 20
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