BIOL108 Lecture Notes - Lecture 5: Atomic Number, Plant Cell, Glycogen
3 Aug 2018
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27th feb 2018: lecture two basic chemistry: atoms: Subatomic particles including electrons, protons and neutrons. Atomic number = # of protons and electrons: molecules: two or more atoms joined together e. g. o2, compounds: two different atoms joined together e. g. h20. H-bonding provides cohesion which is ideal for transporting materials/substances. High heat of vaporization e. g. evaporative cooling. Ice floats as it expands: ph scale, organic chemistry: It always contains a carbon atom and a hydrogen atom. The structure of carbon enables the formation of many other molecules with various other elements: building polymers: Large molecules made by joining many smaller molecules (monomers) together: carbohydrates: (composed of carbon, hydrogen and oxygen atoms) Short term energy storing molecule: simple carbohydrates: (sugars) Release by the liver as a source of immediate energy. Normal maintained at concentrations of about 0. 1% in blood. Lactose: milk sugar: condensation reactions form disaccharides: Glucose + fructose = sucrose: polysaccharides:
