BIOL 101 Lecture Notes - Lecture 4: Hydrogen Bond, Heat Capacity, Surface Tension

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Properties of water: water is most abundant molecule in any living organism and therefore plays a key role, 7 different properties. One of fascinating things about water that you wont really find elsewhere, it has the range to remain a liquid, which is crucial for life. it remains a liquid bc of hydrogen bonding. Water molecules keep moving around but h bonds has the strength to keep it liquid unless you heat or cool it so much. Water is one of the best ones bc of large array of molecules that can dissolve. Fat doesn"t mix with water bc its nonpolar or hydrophobic. They have no charge and aren"t attracted to water. Hydrophilic substances polar, non- ionic molecules. polar means theres unequal sharing in covalent bonds, example is sugar. Its important for water to dissolve sugar in order to get nutrients. Fats get into cells in more difficult ways.

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