3 - http/www4.ncsu.edu/~knopp/BCH451/e98b3.htm BCH 451...

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BCH 451 Summer 1998 Exam #3 1. Draw the predominate structures of the following molecules at the pH = 7.5. Be sure to include all carbon and hydrogen atoms! (3) -D-mannosyl (1- 3) -D ribulofuranose (3) 2-oleyl phosphatidyl ethanolamine (3) ppUpG ( syn ) Fill in the blanks (0.5 each): Chemical linkage in amylopectin Alcohol derivative of mannose Alcohol derivative of glucose Acid derivative of glucose Essential fatty acids Full name of cAMP Full name of IP 3 Common name of C18:3 Full name of the dictionary molecule for protein synthesis (1) What is(are) the determining factor(s) that will classify a carbohydrate as a reducing sugar? (2) Explain the sentence - "Polysaccharides are advantageous because they have low osmotic pressure." [Hint: start by defining osmotic pressure.] (1) Sphingomyelin has these unusual chemical characteristics [give a list]: (1) Cholesterol has these chemical characteristics [give a list]: (1) Where are carbohydrates found on biological membranes? (4) For the following table, which was included in the Biochemical Hints, summarize the conclusions from the data and
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