Chapter 8 Answers - Chapter 8 Study Guide answers. 1. See...

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Chapter 8 Study Guide – answers. 1. See Figure: Figure 2. A. If HisP functions as a gene repressor, it would bind more tightly to the regulatory sequences when histidine is abundant, because the histidine biosynthetic genes should be turned off when the cell has enough histidine. B. If HisP functions as a gene activator, it should bind more tightly to the regulatory sequences when histidine levels are low. When histidine levels are low, the cell needs to synthesize more histidine 3. Any three of these are acceptable. 1. Bacterial cells contain a single RNA polymerase whereas eucaryotic cells have three. 2. Bacterial RNA polymerase can initiate transcription without the help of additional proteins whereas eucaryotic RNA polymerases need general transcription factors. 3. In eucaryotic cells, gene regulatory proteins can influence transcriptional initiation thousands of nucleotides away from the promoter whereas bacterial regulatory sequences are very close to the promoter. 4.
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This test prep was uploaded on 04/02/2008 for the course BIO 2600 taught by Professor Vanburkem during the Winter '08 term at Wayne State University.

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Chapter 8 Answers - Chapter 8 Study Guide answers. 1. See...

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