Exam_2_with_key - BMB 461 Exam 2 March 20, 2006 There are...

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BMB 461 Exam 2 March 20, 2006 There are six pages for this exam and 44 questions. Questions 1-24 are worth 2.5 points each. Question 25-44 are worth 2 points each. 1.) Which of the following monosaccharides is not an aldose? A) erythrose B) glucose C) fructose XXXXX D) glyceraldehyde E) ribose 2.) ) When two carbohydrates are epimers: A) one is a pyranose, the other a furanose. B) one is an aldose, the other a ketose. C) they differ in length by one carbon. D) they rotate plane-polarized light in the same direction. E) they differ only in the configuration around one carbon atom. XXXXXX 3.) Which of the following is an epimeric pair? A) D-glucose and D-glucosamine B) D-glucose and D-mannose XXXXXXX C) D-glucose and L-glucose D) D-lactose and D-sucrose E) L-mannose and L-fructose 4.) Which of the following pairs is interconverted in the process of mutarotation? A) D-glucose and D-fructose B) D-glucose and D-galactose C) α -D-glucose and β -D-glucosamine D) D-glucose and L-glucose Ε) α -D-glucose and β -D-glucose XXXXXXXX 5.) Which of the following is not a reducing sugar? A) Fructose B) Glucose C) Ribose D) Sucrose XXXXXX E) Glyceraldehyde 1
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6.) In the structure below, how many of the monosaccharide units are furanose and pyranose structures? What is the linkage between the two monosaccharide units? Is this a reducing sugar? A) One furanose and one pyranose, an alpha linkage and a reducing sugar B) Two pyranose, a beta linkage and a reducing sugar XXXXXXXX C) Two pyranose, a beta linkage and a non-reducing sugar D) Two furanose, a beta linkage and a reducing sugar E) Two furanose, a beta linkage and a non-reducing sugar 7.) Which of the following statements about starch and glycogen is false ? A) Amylose is unbranched; amylopectin and glycogen contain ( α 1- 6) branches. B) Both are homopolymers of glucose. C) Both serve primarily as structural elements in cell walls. XXXXXXX D) Both starch and glycogen are stored intracellularly as insoluble granules.
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This note was uploaded on 03/19/2008 for the course BMB 461 taught by Professor Stoltzfus during the Fall '07 term at Michigan State University.

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Exam_2_with_key - BMB 461 Exam 2 March 20, 2006 There are...

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