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Phase 1

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
Cells (1)   show
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show composed by "communities of cells"  
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show cells of specialised function within "communities" which makes up higher level organisms  
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show semi-independent, living unit within living things; completely independent in unicellular organisms; in which are cited mechanisms for metabolism, growth and replication (via division)  
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Basic cellular composition   show
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Organelle   show
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Ribosome   show
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show an organised assembly of cells and their extracellular products; this assembly of cells carry out similar and coordinated activities within the body  
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Connective, lympoid   show
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show an assembly of tissues coordinated to perform specific functions within the body  
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Eye, ear, heart, lungs, liver   show
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Prokaryote (1)   show
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Prokaryote (2)   show
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show a single or multi-celled organism in which the chromosomes are enclosed in the nucleus; typically have cytoplasmic, membrane-bound organelles;  
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Eukaryote (2)   show
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Eukaryote (3)   show
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show an assemblage of nucleic acid (DNA or RNA) and proteins along with other molecules which is parasitic of prokaryotes/eukaryotes; not cells or organisms  
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show major components of a virus  
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show invade cells, subvert their protein synthesis to make more of themselves instead of normal cell proteins, then escape to infect other cells  
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Virus (3)   show
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0.2-2.0 micro m   show
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10-100 micro m   show
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ER, Golgi bodies, lysosomes, mitochondria, chloroplasts   show
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show arrangement of microtubules in flagella and cilia as opposed to amboid action  
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Flagella   show
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show used for motility in eukaryotes  
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show used for motility in prokaryotes (2)  
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show found in all eukaryotes but only in prokaryote organisms that undergo photosynthesis; allows for specialised environments to exist within organelles; allows for different functions to operate under different conditions (e.g. pH)  
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Cytoskeleton   show
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show made of peptidoglycan in bacteria (thick in gram positive, thin in gram negative); made of pseudopeptidoglycan or polysaccharides or glycoprotein in Archaea bacteria  
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show asexual reproduction found in prokaryotic organsims  
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Mitosis and/or meiosis   show
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Capsule or slime layer   show
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Pellicle or shell   show
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show all living things are made up of cells and these arrive through the division of pre-existing cells  
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show organelles only found in eukaryotes  
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show found in eukaryotes and prokaryotes, contains sterols in eukaryotes  
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show the only tool that can reveal subcellular details of a cell; involves elaborative preparation and can only be used to dead cells; e.g. TEM and SEM  
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Transmission electron microscope (TEM)   show
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Scanning electron microscope (SEM)   show
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show diffusion over 50 micro meters is no longer efficient; surface area to volume needs to be considered; distance from nucleus to periphery influences movement of intermediates, waste products and nutrients  
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show rate of diffusion proportional to (SA x concentration^n difference)/ distance  
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Solutions to Flick's law   show
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show protein filaments that make up cytoskeleton; all contribute to mechanical strength, control shape, drive and guide movement of materials  
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Actin   show
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show thickest protein filament in cytoskeleton; pulls daughter cells apart  
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show give a cell its mechanical strength; protein filament in cytoskeleton  
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Cytosol   show
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Cytoplasm   show
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show largest organelle in the cell (diam. 3-10 micro metres)  
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Nucleus (2)   show
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show contains genetic material that is packaged  
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show organised DNA within the nucleus of a eukaryote  
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show complex of DNA/histone and non-histone proteins; found in chromosomes  
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Nucleusomes   show
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1.8m   show
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95mm   show
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120 micrometers   show
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Nucleolus   show
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Nuclear envelope   show
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Nuclear pores   show
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show organelles that function in secretion; found in ECs  
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show involved in the biosynthesis of lipids, steroids; metabolise carbohydrates/steroids  
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show coated with ribosomes which are the sites of translation ie protein production/ secretion or insertion into cell membrane; proteins are folded hear and vesicles are bundled and transported to Golgi  
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show 4-8 closely-stacked, membrane-bound channels; modifies proteins delivered from RER by adding sugar or lipid side-chains (example); synthesises or packages materials to be secreted  
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Golgi body (2)   show
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show bud off from the Golgi; fuse with the inner surface of the plasma membrane and release in their contents via exocytosis (inc. hormones, neurotransmitters); used to ID Golgi bodies under a microscope  
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Lysosomes (1)   show
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show powerful enzymes that require low pH; their proteins are tagged with mannose -6- phosphate; appear dark under staining  
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show large (0.5-1.5 micro meter) vesicles; not very electron dense; detox; phospholipid synthesis; enzymes which generate and degrade H202; do not appear as dark as lysosomes when stained  
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show inherited absence of peroxisomes  
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show organelles highly involved with metabolic activity; their number per cell reflects metabolic activity; oxidises sugars to generate ATP (Krebs cycle)  
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show organelle which contains its own DNA which encodes some of its own proteins  
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Cristae   show
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Kerbs cycle enzymes   show
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show organelle disease; mutation of mitochondrial gene for tRNA-lys; disrupts synthesis of oxidate phosphorylation enzymes  
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show organelle disease; mutation in lamin A of nuclear envelope; distorted shape of nucleus (blebbed); production of unique progerin protein as opposed to lamin A;  
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Tay Sachs Disease   show
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