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Test2(1) - BCH 4053 March 9 2001(5 1 2 NAME Circle the...

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BCH 4053 March 9, 2001 HOUR TEST 2 NAME_____________________ (5) 1. Circle the following monosaccharides which are aldoses . glucose fructose ribose glyceraldehyde dihydroxyacetone (5) 2. Circle the following monosaccharides which are pentoses . fructose galactose ribose threose ribulose Page Points 1 ____ 2 ____ 3 ____ 4 ____ Total ______ (4) 3. Identify the following pairs as enantiomers , epimers , or anomers . More than one term may apply to a pair. ________________ (a) α -D-galactose and β -D-galactose ________________ (b) D-threose and D-erythrose ________________ (c) α -D-mannose and α -L-mannose ________________ (d) α -D-glucose and α -D mannose (4) 4. Circle each of the following terms which is a correct description of the disaccharide sucrose : β -fructoside ketal hemiacetal β -glucoside furanoside pyranoside reducing sugar α -galactoside (4) 5. Give the name and draw the structure of: (a) the disaccharide found in milk. (b) the monosaccharide building block of chitin , the major structural polymer of insects. (9) 6. Circle the following lipids which are negatively charged at pH 6, and underline those that contain a nitrogen atom.
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