Biology Revision For Test 5.0 / 5 based on 1 rating ? BiologyCellsGCSEOCR Created by: DressageDiva04Created on: 24-11-18 17:52 Total Magnification Eye piece lens X Objestive lens 1 of 38 Magnification When something appears bigger than it really is 2 of 38 Electron Microscope Has a higher resolving power 3 of 38 Light Microscope Uses visible light and has a lower resolving power 4 of 38 Cell Membrane Controls what enters and leaves the cell 5 of 38 Nucleus The organelle which controls the cell 6 of 38 Cytoplasm The liquid in the cell where chemical reactions happen 7 of 38 Mitochondria The organelles which release energy by respiration 8 of 38 Ribosomes The organelles which make proteins ( Where proteins are made ) 9 of 38 Cell Wall The organellewhich gives shape and structure to the cell 10 of 38 Vacuole A place that stores food and water and also gives shape to the cell 11 of 38 Chloroplasts Organelles that trap light for photosythesis 12 of 38 Prokaryotic Cell A cell that does not have its genetic material in a nucleus 13 of 38 Eukaryotic Cell A cell which has its genetic material in a nucleus 14 of 38 Plasmid Loop of DNA in a bacteria cell 15 of 38 DNA The chemical that makes up genes and chromosomes 16 of 38 Double Helix The shape of DNA 17 of 38 Polymer Is made up of Monomers, Big Molecule e.g. DNA 18 of 38 Monomer Repeating unit that makes up a big molecule e.g. Nucleotide 19 of 38 Nucleotide Monomer of DNA - Made up of phosphate, sugar and a base 20 of 38 Bases Four chemicals within DNA - A, T, G, C 21 of 38 mRNA Copy of genes as it moves out of the cell 22 of 38 Enzymes Biological Catalysts = 1. Made up of proteins 2. Where reactions happen 3. NOT LIVING 23 of 38 Substrate Molecule that fits into the enzyme - Molecules collide and then join 24 of 38 Active Site Where the substrate joins to the enzyme 25 of 38 Denature When the active site changes shape and can't bind with the substrate 26 of 38 Lock and Key Hypothesis The model for how enzymes work 27 of 38 What type of cell is an Animal Cell? This is a Eukaryotic Cell because it has a nucleus 28 of 38 What type of cell is a Plant Cell? This is a Eukaryotic Cell because it has a nucleus 29 of 38 What type of cell is a Bacteria Cell? This a Prokaryotic Cell because it does not have a nucleus so can't store its genetic material in there ( a nucleus) 30 of 38 1 metre = _ cm 100 31 of 38 1 metre = _ mm 1000 32 of 38 1mm = _ μm ( microns/ Micrometres) 1000 33 of 38 List the parts to a Microscope 1. eye piece 2. optical lens ( red = x4, yellow= x10, blue = x40) 3. stage 4. mirror 5. base 6. glass slide 7. arm 8. focus dial ( main, coarse, fine) 9. specimin 34 of 38 Micrograph A photograph taken by mean of a microscope 35 of 38 How do you find the Image Actual size X Magnification 36 of 38 *** do you find the Actual size Image divided by Magnification 37 of 38 How do you find the Magnification Image divided by actual size 38 of 38
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