Problem set 4 - chapter 10 - bacterial regulation

Problem set 4 - chapter 10 - bacterial regulation - Problem...

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Problem set #4 – For Recitation the week of March 22 nd . From Griffiths et al textbook: From Chapter 10 : 1, 2, 3, 4, 5 , 11, 14, 18 1. I- mutations are recessive to I+ mutations because the presence of a repressor will be dominant to the absence, it add function. IS mutations are dominant to I+ mutations because Is is unresponsive to the inducer and will always block the operator, therefore it is dominant 2. OC mutations in the lac system are cis-acitng because they only affect th eoperon of the gene with the mutation. Other O genes function normally. 3. 4. 5. In negative control the repressor must be taken off for transcription to occur and in positive control the activator must be added for transcription to occur 11. I- is partly dominant because in a I-/I+ heterodiploid some lactose enzymes will be produced even in the presence of lactose because I- allows for the expression of lac genes even in its absence 14. Additional Questions:
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This note was uploaded on 11/04/2011 for the course BIOL 202 taught by Professor Kieber-hogan during the Fall '08 term at UNC.

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Problem set 4 - chapter 10 - bacterial regulation - Problem...

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