Answered: Transcription in eukaryotic cells which…

Transcription in eukaryotic cells which is resistant to α-amanitin is carried out by which RNA polymerase: RNA pol I only RNA pol II only RNA pol I and III RNA pol III only

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

In eukaryotes, sequences that act as binding sites for proteins which alter the accessibility to RNA polymerases are called? Enhancers Promoters Silencers All of the above
What is the function of cAMP in regulation of the lac operon? Group of answer choices it activates a repressor protein it activates an activator protein it inactivates an activator protein it inactivates a repressor protein
Which of the following arabinose operon regulatory sites is exclusively involved in the repression of the transcription of the ara operon? ara PBAD ara O1 ara O2 the CAP binding site ara B
external lactose cell membrane on RNA polymerase promoter lactose permease B-galactosidase allolactose lac repressor mRNA operator lacZ lacY lacA lac Operon When glucose is present along with the presence of lactose, the lac operon would be: off
Given the Table below concerning the lac operon, match the letter with what would be occurring for each scenario. Repressor is bound to the operator, cAMP complex is bound and transcription is prevented. Allolactose is bound to the repressor, cAMP complex is bound, and transcription is prevalent. Allolactose is bound to the repressor, cAMP complex is not assembled, and transcription is slow Repressor is bound to the operator, cAMP complex is not assembled, and transcription is prevented.
How do sigma factors help regulate gene expression during the transition to stationary phase? Sigma factors are transcriptional inhibitors, they stop transcription entirely so the bacteria don't waste energy on transcription during starvation Stationary phase is caused by rifampin treatment, and sigma factors block rifampin activity, thereby preventing the onset of stationary phase. Sigma factors create extra nutrients by fixing CO2 and N2 in the air, thereby preventing the onset of stationary phase. Different sigma factors recognize different promoters. Sigma factors that recognize stress response and catabolic metabolism promoters are expressed during stationary phase and the housekeeping sigma factor is downregulated. Thus, transcription shifts toward stress response and away from growth. Sigma factors bind the ribosome and block it from translating certain MRNAS that no longer need to be translated in stationary phase
Which of the following is not necessary for CAP associated transcription? ATP Adenyl cyclase Glucose None of the above All of the above
What is a specific region in the trp operon that you could mutate so it expresses the trp operon in conditions of excess tryptophan. Why will this mutation cause this? Operon structure: promoter, operater, structural genes promoter - DNA region that is the site of RNA polymerase sigma binding and transcription initiation operator – DNA region that influences gene expression through its interaction with a protein (transcription factor) structural genes – gene whose expression is being regulated; encodes a polypeptide or functional RNA
The organization and function of the lac operon in E. coli is shown in the following figures: XXI Transcription Repressor mRNA Translation RNA polymerase M M Flask ZYA XXXX Active M-repressor protein Repressor active, operon off. The repressor protein binds with the operator, preventing transcription from the operon. (a) An inducible operon Copyright © 2007 Pearson Education, Inc., publishing as Benjamin Cummings Allolactose (inducer) Carbon/Energy Source 0 Z MInactive repressor protein (a) An inducible operon Transcription Translation XXX Permease B-Galactosidase Transacetylase Operon mRNA 3 Repressor inactive, operon on. When the inducer allolactose binds to the repressor protein, the inactivated repressor can no longer block transcription. The structural genes are transcribed, ultimately resulting in the production of the enzymes needed for lactose catabolism. Copyright © 2007 Pearson Education, Inc., publishing as Benjamin Cummings Suppose you inoculate three flasks of minimal…
Why is it beneficial for the bacterium to regulate the lac operon with both a repressor protein and an activator protein?
A mutation at the operator site of a positive inducible operon that causes the sequence of the operator to change, would result in: Group of answer choices Activator unable to bind to DNA, transcription turned on Activator binds to DNA, transcription turned off Activator binds to DNA, transcription turned on Activator unable to bind to DNA, transcription turned off
When referring to attenuation in the regulation of the trp operon it would be safe to say that, when there are high levels of tryptophan available to the organism, transcription termination at the attenuator region is likely the ribosomes stall during translation of the attenuator region translation termination of the trp operon is likely the trp operon is transcribed at relatively high levels tryptophan inactivates the repressor protein