Fall 2008 Exam and Solutions

Fall 2008 Exam and Solutions - PLEASE PRINT YOUR NAME HERE,...

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PLEASE PRINT YOUR NAME HERE, AS LEGIBLY AS POSSIBLE SURNAME : __________________________________ GIVEN NAME : ________________________________ STUDENT NUMBER: _______________________ Remember to enter your name and student number on the “scantron” card! (Your e-mail address is not required.) BIOC*2580 FINAL EXAMINATION FALL 2008 Wedn., Dec. 3, 2008, 11:30 a.m. - 1:30 p.m. Instructor: Dr. D. Josephy Instructions: Time allotted = 2 hours (120 minutes). This is a closed-book exam: no notes or aids of any kind (other than a calculator with no stored information) may be consulted. This booklet has 11 pages, plus the metabolic chart, attached at the end. Total marks for this paper = 60 This examination determines 45% of the final course grade. Section A. Multiple-choice questions. 35 questions; 1 mark per question; no marks will be deducted for incorrect answers. Use a soft pencil to mark your answers on the test-scoring card . Section B. Short-answer questions. 25 marks. All answers should be written in this booklet. (Do not write below this line) 14 25 36 MC WR
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Surname: ___________________ Given name: _____________ Number: ________________ p. 2 1. All of the following amino acids have side-chains that are composed entirely of C and H atoms, except : a) alanine; b) isoleucine; c) methionine; d) phenylalanine; e) valine. 2. Which of the following alcohols is not commonly found as a constituent of phosphoglycerides? a) choline; b) ethanolamine; c) glycerol; d) serine; e) threonine. 3. The 12-carbon saturated fatty acid is called: a) arachidic; b) arachidonic; c) lauric; d) myristic; e) stearic ... acid. 4. Phosphoglycerides (glycerophospholipids) are major components of all biological membranes. These molecules are glycerol derivatives bearing fatty acids at positions 1 and 2, and a polar phosphate + alcohol “head group” at position 3. Which one of the following statements best describes the typical composition and arrangement of the fatty acids in phosphoglycerides? a) Unsaturated fatty acids are common in triacylglycerols (storage fats), but are only rarely found in phosphoglycerides ; b) The fatty acid at position 1 is saturated and the fatty acid at position 2 is unsaturated ; c) The two fatty acids in any phosphoglyceride molecule are either both saturated or both unsaturated ; “mixed” saturated + unsaturated combinations are rare; d) Long-chain (18 or 20 carbon atoms) fatty acids are found at position 1 and short-chain (12 or fewer carbon atoms) are found at position 2 ; e) The ratio of saturated to unsaturated fatty acids varies considerably among animal species, depending mainly on their body temperatures; however, their distribution between sites 1 and 2 is (as far as can presently be determined) essentially random. 5. An appropriate instrument with which to observe the phenomenon of mutarotation, in a sugar solution, is a (an) . .. a) optical (visible wavelength) spectrometer; b) infrared spectrometer; c) fluorescence spectrometer; d) polarimeter; e) liquid scintillation counter.
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This note was uploaded on 09/21/2011 for the course BIOOC 2580 taught by Professor Douger during the Fall '10 term at University of Guelph.

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Fall 2008 Exam and Solutions - PLEASE PRINT YOUR NAME HERE,...

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