1 SEM ACC W/RAVEN CARDED
12th Edition
ISBN: 9781265486297
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 16.4, Problem 2LO
Summary Introduction
To determine: The formation of a Polymerase II initiation complex.
Introduction: Eukaryotic transcription requires a variety of protein transcription factors. There are two types of transcription factors, general transcription factors, and specific transcription factors.
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Explain how the Pyrococcus furiosus TrmBL1 transcriptionregulator is able to act as both an activator and a repressor.
Assume that a mutation occurs in the gene that encodes RNA pol II. What would be the effect of the mutation?
a) State the functions of the subunits of RNA polymerase and describe transcription initiation.
b)Draw a diagram to illustrate the lac operon and explain how it functions in the presence of, i) glucose and ii) lactose in the culture medium
Chapter 16 Solutions
1 SEM ACC W/RAVEN CARDED
Ch. 16.1 - Prob. 1LOCh. 16.1 - Prob. 2LOCh. 16.1 - Prob. 3LOCh. 16.2 - Explain how proteins can interact with base-pairs...Ch. 16.2 - Prob. 2LOCh. 16.3 - Prob. 1LOCh. 16.3 - Prob. 2LOCh. 16.3 - Explain control of gene expression in the trp...Ch. 16.4 - Prob. 1LOCh. 16.4 - Prob. 2LO
Ch. 16.4 - Prob. 3LOCh. 16.5 - Describe at least two kinds of epigenetic mark.Ch. 16.5 - Explain the function of chromatin-remodeling...Ch. 16.6 - Prob. 1LOCh. 16.6 - Prob. 2LOCh. 16.7 - Prob. 1LOCh. 16.7 - Prob. 2LOCh. 16 - Prob. 1DACh. 16 - What advantage might a bacterium gain by linking...Ch. 16 - Prob. 2IQCh. 16 - Prob. 3IQCh. 16 - In prokaryotes, control of gene expression usually...Ch. 16 - Prob. 2UCh. 16 - Prob. 3UCh. 16 - The lac operon is controlled by two main proteins....Ch. 16 - In eukaryotes, binding of RNA polymerase to a...Ch. 16 - In eukaryotes, the regulation of gene expression...Ch. 16 - In the trp operon, the repressor binds to DNA a....Ch. 16 - Prob. 1ACh. 16 - Specific transcription factors in eukaryotes...Ch. 16 - Repression in the trp operon and induction in the...Ch. 16 - Regulation by small RNAs and alternative splicing...Ch. 16 - Eukaryotic mRNAs differ from prokaryotic mRNAs in...Ch. 16 - In the cell cycle, cyclin proteins are produced in...Ch. 16 - A mechanism of control in E. coli not discussed in...Ch. 16 - You have isolated a series of mutants affecting...Ch. 16 - Examples of positive and negative control of...Ch. 16 - What forms of eukaryotic control of gene...Ch. 16 - The number and type of proteins found in a cell...
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- List the components of eukaryotic Pol II promoters.arrow_forward8:20 ■■ LTE < Spring 2024 - Senior Comprehensives (... Question 6ɔ (ividitudtory) In the Lac operon, what happens when allolactose attaches to the repressor protein? a) b) c) the repressor is induced to attach to the promoter RNA polymerase is induced to attach to the operator lactose synthesis enzymes are produced by genes Z, Y,A d) the repressor is inactivated Question 88 (Mandatory) What is the purpose of X-chromosome inactivation in mammals? a) It accomplishes dosage compensation. b) It assists in the interactions beteeen genes Tra and Dsx. c) It prevents trisomy from occurring. d) It produces the testis determination factor. Question 94 (Mandatory) Duchenne muscular dystrophy is inherited in an X- linked recessive pattern. A female is known to be heterozygous for Du muscular dystrophy XD xdarrow_forwardThe lactose operon is likely to be transcribed when _____. A) there is more glucose in the cell than lactose B) there is glucose but no lactose in the cell C) the cAMP level is high and the lactose level is low D) the cyclic AMP and lactose levels are both high within the cellarrow_forward
- Predict the effect on the activity of the lac operon of a mutation that disrupts the function of: a) the cap gene, which encodes the CAP protein. b) the CAP-binding site.arrow_forward11arrow_forwardWhich reaction normally happens in the regulation of the trp operon when high levels of tryptophan are present?arrow_forward
- Describe how transcription is terminated with and without Rho factor.arrow_forwardExplain briefly the transcription termination stage.arrow_forwardWhat general transcription factors associate with an RNA polymerase II promoter in addition to the polymerase? In what order do they bind in vitro?arrow_forward
- How does tryptophan affect the function of trp repressor?arrow_forwardIn the trp operon, if a mutation occurred in the gene for the repressor so that it could bind to the operator even in the absence of tryptophan____________. a) the inducer cannot bind trpO, so operon gene transcription occurs b) the active repressor cannot bind trpO, so operon gene transcription is attenuated c)the active repressor binds tpO, so operon gene transcription is always repressed d) the repressor binds the corepressor, and operon gene transcription occurs.arrow_forwardDescribe what would happen to the lac operon in a low-lactose environment and in a high lactose environment. a) How will each of these environments affect gene expression? b) What would happen to the repressor in each case? c) How will each of these environments affect RNA polymerase?arrow_forward
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