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Exam III 2005 - Name General Biochemistry Tuesday December...

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Name: General Biochemistry Tuesday, December 2oth, 2005 4:OO-6:00 PM Put your name and identification number on the answer sheet. Mark only one answer for each question on the answer sheet. Use only the pencil provided for the examination. Do not fold or bend the answer sheet. Make sure you have 1 1 question pages. Read each question carehlly. 1. Which of the following are polar lipids contain ceramide? A. Phosphatidylcholine B. Phosphatidylethanolamine C. Sphingomyelin D. Cardiolipin E. All glycerolphospholipids 2. The naturally occurring fatty acid 22:2 A"I2 A. Will have double bonds in cis and trans conformations B. Is an omega- 3 fatty acid C. Will be very soluble in water D. Will have a higher melting point than fatty acid 22: 1 a9 E. Will have a higher melting point than fatty acid 16:2 A9)I2
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For questions 3-4. Match the following to the structure below: A. Phosphatidylinisitol B. Sphingomyelin C. Triacyglceride D. Phosphatidylcholine E. Phosphatidylethanolamine F. Phosphatidylserine G. Cardiolipin H. Plasmologen May be 1 C-4 or 0 C-4 and C-5 0 Ctip CH:, I ! I <-7,,+ Long aliphat~c chains
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5. In order to obtain choline you will have to cleave phosphatidylcholine with which enzyme 6. Lipids serve the following functions A. Major storage form of energy as diglycerides B. Important structural component as amphiphilic lipids C. Intracellular signaling as triglycerides D. Major storage form of energy as amphiphilic lipids E. Intercellular signaling as triglycerides 7. All of the following statement is true regarding the lipids in the membranes, except 8. All of the following statements concerning artificial membranes are correct except
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