Practice_Exam2_fromF07

Practice_Exam2_fromF07 - Genetics 382-001, Fall 2007, J....

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Genetics 382-001, Fall 2007, J. Heller In-Class Exam 2, October 18, 2007 Name ________________________________ Total questions = 10 Total points = 50 Some questions have multiple parts, so be sure to answer them all. Please try to answer each question in the space provided. You may use the backside of these pages and/or attach additional sheets of paper if needed (with your name on them). Feel free to add diagrams where appropriate to supplement and/or clarify your answer. Try to remain brief and to the point! 1) Draw a rough sketch of a helix-turn-helix motif bound in the major groove of DNA (or describe it in words if you don’t feel up to the artistic challenge). Using the trp repressor as an example, describe how this binding/conformation can be affected by the presence or absence of tryptophan. (5 pts) Page 1 of 6
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2) A standard DNA double helix (B-form) has major and minor grooves. The four possible
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Practice_Exam2_fromF07 - Genetics 382-001, Fall 2007, J....

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