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Plasma Membrane

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by

Ana Gaston

on 13 February 2018

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Transcript of Plasma Membrane

Atoms
Ionic bonds: Occur between ions, particles with an electrical charge,
+ and - charges are attracted
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Biomacromolecules
Lipids are a group of biomacromolecules. They are large, complex but rarely form into polymers (molecules made up of many similar base units)
Viruses
Viruses are not real cells: non-living infectious agents, sharing some characteristics with living things.
A Virus particle (Virion) is made up of a nucleic acid core ( DNA or RNA) coated in protein called Capsid. Alter membranes of hos cells. Outside the cell they do nothing once inside their nucleic acid is activated. They reproduce using the host energy and raw material, causing the cells death and the release of the virus
Plasma Membrane
Bio Unit 3
Cells
Covalent bonds: these are bonds where atoms share electrons. A majority of biological molecules are held together by covalent bonds. When molecules are equal they are non-polar. When there is a lack of balance when end of the atom becomes slightly more positive then the other resulting in Polar molecules.
Hydrogen bonds: These are bonds that are formed by attraction between polar molecules. They are not very strong, being created by only a slight attraction between a partial positive charge to a partial negative charge.
Biological molecules are enormous, made up of many thousands of atoms.
Prokaryotic cells
They are the smallest living cells. Bacteria, archaebacteria and eubacteria are all prokaryotes. Have a cell membrane and cytosol
Lack membrane-bound organelles
Have no nuclear membrane
Have just one circular chromosome
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