Lecture 3 - 3 Biomacromolecules Iain McKinnell Dept Biology...

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3. Biomacromolecules Iain McKinnell Dept Biology
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Chemistry of life: Atoms smallest units of matter that can undergo chemical change made up of three basic subatomic particles protons positively charged neutrons neutrally charged electrons negatively charged particles Valence electrons electrons in the outer shell Participate in chemical reactions Read your Purple Pages
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Diversity within elements
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Ionic Bonds One or more valence electrons completely transferred from one atom to another Form ions atoms or molecules with unequal numbers of protons and electrons
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Covalent bonds Two or more atoms share pairs of valence electrons Non-polar molecules Polar molecules
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Hydrogen bonds Hydrogen bonds weak electrostatic attraction between polar molecules
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Organic compounds Hydrocarbons Simplest of the organic compounds Methane (natural gas) (1C) Ethane (2C) Propane (3C) Butane (lighter fluid) (4C).
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Alcohols Methanol CH3OH Ethanol C2H5OH
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Carbohydrates Comprised simple sugars (monosaccharides)
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Lecture 3 - 3 Biomacromolecules Iain McKinnell Dept Biology...

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