Which of the following defines a master regulator? A condensed, inactivated X chromosome in the body cell of a female mammal A technique of introducing a mutation that disables expression of a gene in an organism A gene whose expression triggers a gene expression cascade that ultimately changes cells in a lineage to more differentiated types A regulatory proteln that influences transcription by binding directly to DNA

Which of the following defines a master regulator? A condensed, inactivated X chromosome in the body cell of a female mammal A technique of introducing a mutation that disables expression of a gene in an organism A gene whose expression triggers a gene expression cascade that ultimately changes cells in a lineage to more differentiated types A regulatory proteln that influences transcription by binding directly to DNA

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter14: Gene Regulation

Section: Chapter Questions

Problem 10TYU: Which of the following is an example of positive control? (a) transcription occurs when a repressor...

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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 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
Which of the following statements is/are true about gene regulation in bacteria? Choose all that could apply Multiple answer apply A genes with related functions are often grouped together and are transcribed into a single piece of RNA B small molecules act as sensors and bind DNA to change its 3D shape C enhancers are commonly used to regulate transcription D repressor proteins block transcription by binding to operator sequences E activator proteins bind near promoters and increase the efficiency of transcription
Which statement is correct about expression of a gene regulated by Gal4? O Galactose increases gene expression by inhibiting Gal80 O Galactose increases gene expression by binding Gal4 O Galactose decreases gene expression by binding RNA polymerase O Gal4 binds to the promoter O Gal80 binds to the promoter
Which of the following best explains why a neuron and a pancreatic cell isolated from the same individual contain different sets of proteins? O Each cell type contains different regulatory proteins and, therefore, they express different proteins. O Each cell type needs different proteins and, therefore, they break down proteins they don't need. O The set of genes in each cell type are different, therefore, they express different proteins. O The genes in each cell type have different promoters and, therefore, they respond to different regulatory proteins.
Which of the following is NOT true about cis-regulatory elements (CREs)? Group of answer choices Enhancers, silencers and promotors can be located anywhere in relation to the gene Enhancers are involved with increasing gene expression CREs often contain motifs that allow transcription factors to bind CREs are involved in determining the timing, location and amount of gene expression
In bacteria, Which of the following mechanisms is the least probable in promoting antibiotic resistance? In bacteria, which of the following mechanisms is the least likely to promote antibiotic resistance? Select one: a chromosomal mutation that alters membrane permeability O receiving a gene that codes for an enzyme that destroys a particular antibiotic O receive a gene or genes that code for the production of the capsule a chromosomal mutation that alters the shape of the drug receptor O receiving a gene or genes that code for a "multidrug resistant" pump
Which of the following statements about the control of genes involved in galactose metabolism in yeast is FALSE? The genes coding for enzymes acting in the gal system are organized in an operon. The system involves a transcription activator. The system involves a transcription repressor. The presence of galactose sequesters the repressor in the cytoplasm. none of the above
Which of the following statements about the control of genes involved in galactose metabolism in yeast is FALSE? Choose one of the answers below The genes coding for enzymes acting in the gal system are organized in an operon. The system involves a transcription activator. The system involves a transcription repressor. The presence of galactose sequesters the repressor in the cytoplasm. none of the above
Below is a model of a signal transduction pathway that results in the transcribing of mRNA: Receptor protein Transcription factor Phosphorylation cascade DNA mRNA What is the best description of what would happen if the phosphorylation cascade resulted in a phosphate being attached to the transcription factor? O mRN would not stop being transcribed from the DNA. O The phosphorylation cascade would continue to release excess phosphates. O mRNA would stop being translated from the DNA. O Receptor proteins would not bind to the signaling hormone.
Which of the following are regulatory elements (regions of DNA that are not transcribed or translated, but have a regulatory role)? Insulators Promoters Small interfering RNAS Transcriptional activator proteins Enhancers Transcription factors O Response elements
In the regulatory switch experiment, which level of gene expression regulation is the focus? Regulatory switch Enhancer Mouse Enhancer Bat Enhancer Bat-mouse translation level regulation transcription level regulation post-translational regulation O post-transcriptional regulation (RNA modification)