BIOL 1107 Lecture Notes - Lecture 1: Hydrogen Bond, Chemical Polarity, Heat Capacity

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8 Sep 2015
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Our bodies contain more water than any other compound. Water is the most abundant compound on earth"s surface. The bond between oxygen and hydrogen is a polar covalent bond, a covalent bond formed by the unequal sharing of electrons. The two hydrogen atoms do not lie along a straight line with the oxygen atom. They form an angle of 104. 5 degrees- molecular geometry referred to as bent shape: asymmetrical shape causes one side of the molecule to have a positive charge and the other to have a negative charge. Water molecule is therefore a dipole: a structure with positive and negative poles. Blood, inside or outside of cell membrane because you want it to be water based environments. Stomach (mucus membrane) epithelial tissue creates a border and you don"t want the border to dissolve in water; skin. They"re hydrophilic because carbohydrates have hydroxyl groups (oh-).

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