Which level of gene regulation is involved when alternative sigma factors change the recognition of promoter sequence. O transcriptional O translational O post-translational O post-transcriptional O genome level

Which level of gene regulation is involved when alternative sigma factors change the recognition of promoter sequence. O transcriptional O translational O post-translational O post-transcriptional O genome level

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Description: 11 Which level of gene regulation is involved when alternative sigma factors change the recognition of promoter sequence.O transcriptionalO translationalO post-translationalO post-transcriptionalO genome level

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter9: Molecular Biology

Section: Chapter Questions

Problem 10RQ: Control of gene expression in eukaryotic cells occurs at which level(s)? a. only the transcriptional...

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Binding of _______ to _______ in DNA can increase the rate of transcription of specific genes. a. activators; repressors c. repressors; operators b. activators; enhancers d. repressors; enhancers
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
Control of gene expression in eukaryotic cells occurs at which level(s)? a. only the transcriptional level b. epigenetic and transcriptional levels c. epigenetic, transcriptional, and translational levels d. epigenetic, transcriptional, post-transcriptional, translational, and post-translational levels
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
Post-translational control refers to: a. regulation of gene expression after transcription b. regulation of gene expression after translation c. control of epigenetic activation d. period between transcription and translation
Regulation of gene expression most typically occurs at the level of ______________. Select one: a. transcription b. post-transcription c. post-translation
Which of the following gene expression regulatory mechanisms saves the most energy but takes the longest to fully express the genes once signaled? a. transcriptional regulation b. post-transcriptional regulation c. post-translational regulation d. translational regulation
For each of these things, say whether it describes the coding sequence or the regulatory sequence. The ______________ sequence determines the order of a protein’s amino acids. The ______________ sequence attaches to transcription factors. The ______________ sequence is where RNA polymerase attaches to start transcription. The ______________ sequence includes the start and stop codons. The ______________ sequence allows the gene to be activated in some cells but not others.
What is the function of each of the following gene transcription elements? Positive transcription factors RNA polymerase Ribosome mRNA destroyer Transcription factor negative
Which of the following mechanisms is an example of post-transcriptional gene regulation? A. binding of a repressor protein to an operon B. alternative splicing of exons in an RNA transcript C. acetylation of histones in chromatin D. methylation of specific regions of DNA
Which of the following statements about gene expression is false?a) More than one RNA polymerase can be transcribing a specific gene at a given time.b) More than one ribosome can be translating a specific transcript at a given time.c) Translation begins at a site called a promoter.d) Transcription stops at a site called a terminator.e) Some amino acids are coded for by more than one codon.
Gene expression is Usually regualated at the initiation of transcription. True False