Exam02_2008--Key Biochemestry

Exam02_2008--Key Biochemestry - Name Student(not SS...

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Name_________________________ Student# (not SS#) _________________________ Biological Sciences 1000--Biochemistry EXAM 2 – Part 1 (VanDemark) October 30, 2008 1. Read each question carefully. 2. Print your name on each page. 3. 4. Remember to sign the class list when you turn in your exam. 5. Use a sheet of blank paper (at rear of exam) to cover your answers as you work. Calculators are NOT allowed. Physical Constants that may or may not be helpful today. Boltzmann constant, k = 1.381 x 10 -23 J/K Avogadro’s number, N = 6.022 x 10 23 mol -1 Faraday’s constant, F = 96.48 kJ V -1 mol -1 Gas constant, R = 8.315 J/mol K 25 ° C = 298 K ln 10 = 2.3; log 10 = 1; log 1 = 0 Multiple Choice Questions
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NAME:______________________________ Please mark your selection for the best choice CLEARLY (2 points each). (This section is worth 20 points total.) 1. The type of motion least common in biological membranes is: A) flip-flop diffusion of phospholipid from one monolayer to the other. B) lateral diffusion of individual lipid molecules within the plane of each monolayer. C) lateral diffusion of membrane proteins in the bilayer. D) lateral diffusion of protein molecules in the lipid bilayer E) random motion of the fatty acyl side chains in the interior of the phospholipid bilayer. 2. In glycoproteins, the carbohydrate moiety is always attached through the amino acid residues: A) asparagine, serine, or threonine. B) aspartate or glutamate. C) glutamine or arginine. D) glycine, alanine, or aspartate. E) tryptophan, aspartate, or cysteine. 3. A hydropathy plot is used to: A) determine the water-solubility of a protein. B) deduce the quaternary structure of a membrane protein. C) determine the water content of a native protein. D) extrapolate for the true molecular weight of a membrane protein. E) predict whether a given protein sequence contains membrane-spanning segments. 4.
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Exam02_2008--Key Biochemestry - Name Student(not SS...

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