Biology 1202B Lecture Notes - Spliceosome, Dogma, Tata Box

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coffeebee364

2 Jun 2012

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Document Summary

Lecture 3: transcription, chapter 14, 15 similarity and differences between transcription in prokaryotes and eukaryotes cell transcription and transla- tion occurs simultane- ously in prokaryote. Transcription plex a rna and dna hybrid, but then rna starts to. Initially there is a du- come out near the tail ie the green one. Elongation: reading the string of nucleotides in a sequence of single stranded dna and changing this information into a string of nucleotides of single strand- ed pre-mrna. Termination: releas- and a single mrna produced scription the transcription components on the promoters ing pre-mrna. In nucleus, pre-mrna is processed into mrna dna has a promoter, 5" to 3" utr + most genes have in- trons and need to get rid of them and splice it together. 1. capping, 2. poly a tail 3. splicing of the intron, premature mrna = need to become mature, ready for translation.

Related Questions

Although there are many similarities, transcription is notexactly the same between prokaryotes and eukaryotes. In a 100-150word essay, answer the following questions:

What is one thing that is different between transcriptioninitiation in prokaryotes vs. eukaryotes? What is one thing that isdifferent between transcription termination in prokaryotes vs.eukaryotes? What is one thing that is exactly the same betweenprokaryotes and eukaryotes as it relates to transcriptioninitiation, transcription elongation, and transcription termination(one thing for each stage of transcription)?

brownporcupine378

What are the three processes in post-transcriptional processes that must be completed before transcripts can be translated in eukaryotes?

A.	Binding of snRNPs, addition of a poly A tail, splicing of introns
B.	Binding of snRNPs, transporting, synthesizing of ribose
C.	Capping, transporting, synthesizing of ribose
D.	Binding of snRNPs, capping, splicing
E.	Capping, splicing, addition of a poly A tail

Which of the following key differences between prokaryotic and eukaryotic transcription are TRUE? Check all that apply.

	A. prokaryotic transcription occurs in the cytoplasm, while eukaryotic transcription occurs in the nucleus
	B. eukaryotic transcription is carried out by 1 RNA polymerase, while prokaryotic transcription is carried out by 3 different RNA polymerases
	C. eukaryotic transcripts are processed, while prokaryotic transcripts are translated while transcription is still occurring
	D. prokaryotes have sigma factors for specificity of binding whereas eukaryotes have multiple general transcription factors
	E. prokaryotes have to worry about unpackaging the DNA for transcription, while eukaryotes have almost naked DNA not bound up by nucleosome