img060 - Douglass/Cook Lectures only B The process of...

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Unformatted text preview: Douglass/Cook Lectures only B. The process of translation (Figs. 13-14) Why is polypeptide synthesis called translation? What happens in the translocation step? VI. Flow of information in cells In what way are retroviruses and the process of reverse transcription exceptions to the traditional “central dogma” of genetics and molecular biology? VII. Control ofgene‘eXDression' 7 _ _ _ V L i ,, A U My pf , 3"“ a ’1 a.» , ,,_ , _,__. V'liL- _ a.-- i»... valvok '\; ‘6‘ ii a, B. 4 What are the roles of the promoter, operator, and mpmsor protein in the control of the lacoperon? How does lactose act as an inducer? What is a constitutive gene? Why is the lac operon said to be under negative control? How can negative control be distinguished from positive control? 3. , . Why is the lac operon an example of h'anscripfional level control? B. . Introns and exons - RNA processing in eukaryotes (Fig. 13-17) What happens to introns and exons during transcription? What is precursor m- RNA (pre-mRNA)? Why is exon processing a type of post-transcriptional level control? C. ‘Other types of control in eukm'otes What is post-translational controi? ...
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