Sigma factors: O Are used to express only housekeeping genes in bacteria O Are used by bacteria to guide RNA polymerase to start codons O Prevent the termination of transcription O Are necessary for RNA polymerase to bind specifically to promoters

Sigma factors: O Are used to express only housekeeping genes in bacteria O Are used by bacteria to guide RNA polymerase to start codons O Prevent the termination of transcription O Are necessary for RNA polymerase to bind specifically to promoters

Name: Sigma factors:Are used to express only housekeeping genes in bacteria
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Description: Sigma factors:Are used to express only housekeeping genes in bacteriaAre used by bacteria to guide RNA polymerase to start codonsO Prevent the termination of transcriptionO Are necessary for RNA polymerase to bind specifically to promoters

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter10: Control Of Gene Expression

Section: Chapter Questions

Problem 4SQ

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Similar questions

Which of the following is characteristic of genes and gene regulation in both bacteria and eukaryotes? (a) promoters (b) non-coding DNA within coding sequences (c) enhancers (d) operons (e) DNA located in a nucleus
Which of the following is an example of positive control? (a) transcription occurs when a repressor binds to an inducer (b) transcription cannot occur when a repressor binds to a corepressor (c) transcription is stimulated when an activator protein binds to DNA (d) a and b (e) a and c
Binding or ___ to ___ in DNA can increase the rate of transcription of specific genes. a. activators; repressors b. activators; enhancers c. repressors: operators d. repressors: enhancers
Binding of______ to_______ in DNA can increase the rate of transcription of specific genes. a. activators; repressors b. activators; enhancers c. repressors; operators d.repressors; enhancer
Which of the following is the action of SnRNA (snurps)? a. Knocks out a portion of the gene b. Splices the introns out of m-RNA c. Splices out the exons out of m-RNA d. Important in growth and development
A protein binds a DNA sequence several hundred base pairs upstream of a promoter in a eukaryotic organism. This results in an increased rate of transcription of the gene. What type of protein is this? Group of answer choices Activator Silencer Enhancer Repressor
In bacteria sigma factors: 1. Transcript factors2. Specialized subunit of the core enzyme 3. Signal termination 4. Guide RNA polymerase to different kinds of promoters
The sigma subunit of bacterial RNA polymerase _____. a. binds to a bacterial gene’s promoter b. is composed of both polypeptide and RNA molecules c. is required for termination of transcription d. is required for RNA polymerization e. is required for ribosomal binding
How can transcription factors influence the transcription of DNA? Select all that apply. Inhibit transcription by preventing RNA polymerase from binding to promoters Inhibit translation by preventing the binding of mRNA to ribosomes Enhance transcription by helping RNA polymerase bind to promoters Inhibit transcription by blocking the progress of RNA polymerase along a DNA molecule
In the absence of tryptophan, the trp repressor is Group of answer choices active and can bind to the operator. active and cannot bind to the operator. inactive and cannot bind to the promoter. inactive and cannot bind to the operator.
Initiation of transcription A occurs at terminators B occurs only in eukaryotes C occurs in promoters D none of the above
. Which of the following is an example of post-transcriptional gene repression?a. The amount of RNA transcribed from a gene isreduced because the DNA is methylated.b. The amount of RNA is reduced because it is rapidlydegraded.c. The amount of protein made is reduced by action ofan miRNA.d. b and c are both correct.