BIOL 1107 1nd Edition Lecture 1 Outline of Last Lecture I List of items needed for Biol1107 lab II Where do you find homework for Bio1107 III Teacher s Contact Info and Office Hours Outline of Current Lecture I Biology Chemistry II Define Important Terms III Molecular Interactions Current Lecture I Biology Chemistry In chemistry the molecules we deal with are usually very small However in biology we use much larger molecules as large as 110 Daltons amu A typical protein can range from 25 histones to 200kDa neurofilament II Important Terms Ionic charged molecule loses or gains electrons Covalent sharing of electrons type of bond Polar different electronegativities share electrons unevenly Non polar sharing electrons equally Elements in human body look at Table 2 1 in textbook page 32 Various different electronegativities Oxygen 3 5 Nitrogen 3 0 Carbon 2 5 Hydrogen 2 1 These four elements are key elements and make up 96 of living matter Which of these is most polar These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute a Diatomic oxygen molecule b Methane c Water molecule Answer c water molecule is polar it is very important in biology body is 70 water a and b are both nonpolar molecules Identify atoms with strong partial charges What kind of molecule is this As indicated above this molecule is both polar and non polar covalent III Molecular Interactions Ionic Hydrogen bonding Covalent Van der Waals London dispersion all molecules have this
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