exam2_solutions_2009

exam2_solutions_2009 - BIOL 4087 Section 3 Fall 2009 Exam 2...

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1 BIOL 4087 Section 3 Fall 2009 Exam 2 Oct 20 2009 Part 1: Multiple Choice. Pick the best answer: 5 points each 1) Which of the following amino acid side chains is most likely to be found near the outer surface of a protein in a membrane spanning region? a) Ser b) Gln c) Met d) Arg 2) You observe the following enzyme activity versus substrate concentration curve. This curve suggests that
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2 3) Which of the following is NOT true of Guanyl nucleotide-binding proteins (G proteins)? receptor 4) Phe is replaced in the polypeptide sequence nMet-Gly-Lys-Glu-Ala-Leu-Leu- Lys-Asp-Phe-Asn by amino acid X, and the total charge is increased by 1 at pH 2, but remains the same as it was for the original peptide at pH 8 and at pH 13. The new amino acid is 5) Which of the following will result from adding the molecule below to a membrane bilayer made up purely of phospholipids? a) At low temperature, the membrane will be less fluid b) At high temperature, the membrane will be less fluid c) At high temperature, the membrane will be more fluid d) All of the above
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3 6) The DNA segment 5’dGTTCCG3’ is transcribed to produce ___ and that product is translated to produce ___.
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