Ch17 review - Revised(corrected typos on page 6 Review of chapter 17 Learn classification of biological molecules Amino acids Proteins Fatty acids

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1 Revised April 27, 2010 (corrected typos on page 6) Review of chapter 17 Learn classification of biological molecules Amino acids Proteins Fatty acids Saturated fatty acid Unsaturated fatty acid Glycerol (biological alcohol) Fat Phospholipid DNA RNA Learn to recognize whether a nucleotide sequence corresponds to DNA or RNA AAACCCUGGGUACCC RNA TAAGCTAAGGTT DNA Learn the hydrogen bonding schemes Learn to write the complementary sequence of a DNA strand (We have to keep track of the orientation of the DNA strands) What is the complementary strand of the following DNA sequence? DNA 5' TAAGCTAAGGTT 3' Complementary strand 3' ATTCGATTCCAA 5' ______________________________________________________________ Amino acids and Proteins Why amino acids are important? Cells use amino acids to synthesize proteins. Various proteins carry the various functions needed in cells, in living systems.
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2 Learn to recognize the structure of amino acids General structure of the twenty naturally occurring amino acids To a carbon atom are attached a carboxylic acid group , an amino group ( -NH 2 ), and a side chain ( R ) The carboxylic group can be written as: -CO 2 H -COOH The last one is the most accurate form; the other two are used because they are easier to type. The R group gives the amino acid specific properties : For example: The side chain in the amino acid Isoleucine (Ile) does not interact with water The side chain of Leu is hydrophobic
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This note was uploaded on 02/27/2012 for the course CHEM 112 taught by Professor Harwood during the Spring '11 term at Purdue University-West Lafayette.

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Ch17 review - Revised(corrected typos on page 6 Review of chapter 17 Learn classification of biological molecules Amino acids Proteins Fatty acids

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