Pract Prob Set 3A lect 19-22

Pract Prob Set 3A lect 19-22 - Pract Prob Set 3A Bio61...

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Pract Prob Set 3A Bio61 Geoff Lectures 19-22 1. Campbell chap 19 #1, 2, 4, 8, 9, 10 1. RNA pol II requires _______ to bind a promoter in a human cell. Transcriptional regulatory proteins interact with the _____________complex to stimulate or repress the rate of mRNA synthesis 2. Transcription factors are more likely to bind to a gene if it is wrapped around histones that are more ___________ and its DNA is less _____________. 3. Why can changes in the primary sequence of a transcription factor affect the regions of DNA it binds to? 4. Dr. Mike Robiology has identified a yeast gene that is normally transcribed at a high rate only when the yeast is subjected to high heat. If the enhancers are removed from this gene, what would you expect under high heat conditions? 5 . If an mRNA is transcribed at a very low rate relative to other mRNAs but is found at high levels, what might this suggest about its regulation? 6. The loveable liverwort has identical alleles of only one Cagrovarin gene and there is only one species of Cagrovarin mRNA. However, in the cell, one finds 2 species of protein-one has the size predicted by the coding sequence, and a second appears a little
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This note was uploaded on 05/01/2008 for the course BIO 61 taught by Professor Geoff during the Spring '08 term at Pacific.

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Pract Prob Set 3A lect 19-22 - Pract Prob Set 3A Bio61...

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