B1 0.0 / 5 ? BiologyB1GCSEWJEC Created by: gyatCreated on: 26-05-19 09:17 Function of a cell membrane Controls substances entering and leaving the cell 1 of 21 Function of a cytoplasm Where most chemical reactions take place 2 of 21 Function of a nucleus Contains chromosomes which carry genetic genetic information and controls the activities of the cell 3 of 21 Function of a cell wall Contains cellulose; it supports the plants structure 4 of 21 Function of a chloroplast Absorb light needed for photosynthesis 5 of 21 Function of a vacuole Space filled with cell sap (a dilute solution of sugars and mineral salts.) 6 of 21 Function of a mitocondria Site or aerobic respiration 7 of 21 Magnification of a drawing or picture Length of A-B on picture / Real length of A-B 8 of 21 Light microscopes Allow you to see the image as light passes through it. Magnifies image by X1000 9 of 21 Iodine solution It makes the nucleus more obvious and stains any starch present mostly used to stain plant cells. 10 of 21 Methylene blue Stains acidic parts of the cell blue. Makes the nucleus more obvious. Mostly used to prepare slides of animal cells and bacteria. 11 of 21 Organisms of one cell Unicellular 12 of 21 Organisms of many cells Multicellular 13 of 21 Specialised cells Cells differentiate to cells with a specific function E.G muscle cells 14 of 21 Tissues Groups of similar cells with a similar function 15 of 21 Organ Several tissues performing specific function 16 of 21 Organ System A number of organs working together to carry out specific functions 17 of 21 Diffusion Molecules diffuse from an area of high concentration to an area of low concentration. No energy required 18 of 21 Osmosis The diffusion of water molecules from an area or high water concentartion to an area of low concentration through a selectivity permeable membrane. 19 of 21 Active transport When the concentration of a material is lower outside the cell t must be actively transported into a cell 20 of 21 Enzyme Is a biological catalyst; it speeds up a reaction, but it does not take part in the reaction. 21 of 21
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