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Home Q & A Board Biology-Related Homework Help Biochemistry
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minjai0322 minjai0322
wrote...
13 years ago
Shown below is a co-transcription regulation found in E. coli. Such a segment of DNA forms a unit of transcription and has a name for it. What is that name? Show how lactose induces the transcription and show the transcript.
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wrote...
#1
Educator
13 years ago Edited: 13 years ago, bio_man
Quote from: minjai0322 (13 years ago)
What is that name? Show how lactose induces the transcription and show the transcript.
It's called a Lac Operon...

<object width="420" height="315" classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/ shockwave/cabs/flash/swflash.cab#version=8,0,0,0"> <param name="movie" value="https://http://www.learn.ppdictionary.com/resources/The_Lac_Operon.swf" /> <embed src="https://http://www.learn.ppdictionary.com/resources/The_Lac_Operon.swf" width="420" height="315" type="application/x-shockwave-flash" pluginspage= "http://www.macromedia.com/go/getflashplayer" /> </object>


Also, view this animation (linked below):

Animation Two
karma Author
wrote...
#2
13 years ago
I would have thought there would be a poly A tail, because normally mRNA has it.
wrote...
#3
Educator
13 years ago
Quote from: karma (13 years ago)
I would have thought there would be a poly A tail, because normally mRNA has it.

Prokaryotic mRNAs do not have a poly (A) tail at the 3' end.
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