BIOC 3110 Lecture 36: RNA synthesis and Regulation in Prokaryotes

62 views4 pages

lavendergnu459

30 Nov 2016

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Lecture 36: rna synthesis and regulation in bacteria. Rnap works by reading the template dna strand (aka non-coding/anti- sense strand(cid:524) in the 3" 5" direction, and produces mrna in the 5" 3" direction. In ecoli, rnap transcribes all rna types, not the case in eukaryotes. Promoter is around -35 -10 region; place where rnap binds and recognize gene to which it is going to transcribe. Omega subunit binds and recognizes the promoter region on the dna template strand. Holoenzyme-term referring to the initiating enzyme that includes all subunits listed above. For most genes in ecoli, this is the rate limiting steps, so this holoenzyme binding to the promoter region is highly regulated (ex. Once rnap recognizes the region, it transitions from: what subunits are found in the elongating rna? begins to synthesize closed to open, as the coding and template dna strand spread apart to allow for transcription. Elongating core enzyme-term used to describe the portions of.

Related Questions

Which type of RNA is unique to eukaryotes?

		mRNA
		rRNA
		tRNA
		snRNA
		Its a trick, all cells have all four types of RNA.

1 points

QUESTION 2

The region of DNA to which RNA polymerase binds to initiate transcription is the:

		origin
		promoter
		enhancer
		none of the above are correct

1 points

QUESTION 3

Holoenzyme:

		is RNA polymerase core enzyme.
		is sigma factor.
		is core plus sigma factor.
		none of the above are correct.

1 points

QUESTION 4

Which of these is formed FIRST when RNA polymerase binds to a promoter?

		The closed promoter complex
		The open promoter complex
		A rho-independent terminator
		none of the above are correct.

1 points

QUESTION 5

A hairpin loop followed by a run of Us:

		is the sequence formed in the sense strand of a gene using a rho-independent terminator.
		is the sequence recognized by the rho protein.
		is the structure formed in RNA that causes rho-independent termination.
		is formed immediately after the open promoter complex is formed.

1 points

QUESTION 6

RNA polymerase:

		reads the template strand of the DNA in the 3' to 5' direction.
		synthesizes the RNA in the 5' to 3' direction.
		can begin transcription without a primer.
		all of the above are correct.

1 points

QUESTION 7

Which of the following statements is FALSE?

		Bacteria like E. coli have only one type of sigma factor.
		RNA polymerase has no proofreading activity.
		The promoter of a gene is upstream of the RNA-coding region.
		Bacterial transcriptional terminators are copied into RNA to cause termination.

1 points

QUESTION 8

If the template strand of a gene has the sequence 5' ATGCGAT 3', then:

		the RNA produced will have the sequence 5' AUGCGAU 3'.
		the RNA produced will have the sequence 5' UAGCGUA 3'.
		the RNA produced will have the sequence 5' AUCGCAU 3'.
		None of the above are correct.

1 points

QUESTION 9

The sense strand:

		is the lagging strand
		is also the template strand.
		always goes left to right.
		none of the above are correct.

1 points

QUESTION 10

Which of these is transcribed but not translated?

		mRNA
		tRNA
		rRNA
		all of the above
		tRNA and rRNA are transcribed but not translated.

please help i am a bit confused

BIOC 3110 Lecture 36: RNA synthesis and Regulation in Prokaryotes

Document Summary

Get access

Related Documents

BIOC 3110 Lecture Notes - Lecture 37: Transfer Rna, Arginine, Transcription Factor Ii D

BIOC 3110 Lecture Notes - Lecture 34: Dna Polymerase Iii Holoenzyme, Dna Polymerase I, Replication Protein A

BIOL130 Study Guide - Final Guide: Polysaccharide, Autophagosome, Tethering

Related Questions