BCH 4053 Hour Test 2 - Carbohydrates, Lipids, and Membranes, Exams of Biochemistry

Download BCH 4053 Hour Test 2 - Carbohydrates, Lipids, and Membranes and more Exams Biochemistry in PDF only on Docsity! 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. phosphatidyl choline phosphatidyl serine phosphatidyl glycerol cholesterol sphingomyelin palmitic acid phosphatidic acid phosphatidyl inositol sialic acid BCH 4053 --Hour Test 2 Page 2 Name________________________ (12) 7. Complete the following table by supplying the missing information on each fatty acid. Be sure to show the double bonds in the correct cis or trans orientation. Abbreviation. Common Name Systematic Name Structure Omega designation 9,12-C18:2 Arachidonic Acid 9-Octadecenoic Acid (4) 8. What is the name for the following lipids? (a) The fatty acid amide of sphingosine. _________________ (b) The glucoside of the compound described in part (a).____________________ (c) A glycerophospholipid with a vinyl ether linkage at C-1 of glycerol. _________________ (d) Another name for lecithin. _________________ (6) 9. Distinguish between integral and peripheral membrane proteins in terms of (a) types of solutions used to extract them from membranes. (b) forces by which they are attached to membranes. (c) membrane location in the fluid mosaic model.