Which one of the following is the main reason that a typical eukaryotic gene is able to respond to a far greater variety of regulatory signals than a typical prokaryotic gene or operon? A. Eukaryotes have three types of RNA polymerase. B. Eukaryotic RNA polymerases require general transcription factors. C. The transcription of a eukaryotic gene can be influenced by proteins that bind far from the promoter. D. Prokaryotic genes are packaged into nucleosomes.

Which one of the following is the main reason that a typical eukaryotic gene is able to respond to a far greater variety of regulatory signals than a typical prokaryotic gene or operon? A. Eukaryotes have three types of RNA polymerase. B. Eukaryotic RNA polymerases require general transcription factors. C. The transcription of a eukaryotic gene can be influenced by proteins that bind far from the promoter. D. Prokaryotic genes are packaged into nucleosomes.

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 7TYU: Which of the following is characteristic of genes and gene regulation in both bacteria and...

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A mutation that inactivates the repressor gene of the lac operon results in (a) the continuous transcription of the structural genes (b) no transcription of the structural genes (c) the binding of the repressor to the operator (d) no production of RNA polymerase (e) no difference in the rate of transcription
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
What strategy does a genetically encoded calcium indicator look like to allow fluorescence imaging of only one cell type in an acute slice of the brain? A.The use of fluorescent protein expression inhibitors in other cells B.The injection of a recombinant virus causing the death of other cells C.The use of a promoter specific to these cells D.Activation of membrane receptors specific to these cells
a. What is the function of operons in bacterial gene regulation? b. Describe how a bacterial operon can be regulated by repressible proteins (such as the tryptophan operon). Include in your description both the “on” and “off” states of the operon. Key elements of your diagram should include: Co-repressor, Genes, mRNA, Operator, Operon, Promoter, Repressor, RNA polymerase.
What is the role of a substrate that controls a repressible operon? a. increase the production of inactive repressor proteins b. bind to the repressor protein and activate it c. bind to the repressor protein and deactivate it d. bind to the promoter region and decrease the affinity of RNA polymerase for the promoter
Operons involved with the biosynthesis of molecules such as amino acids are most likely to be regulated in which of the following ways? a. The product of the biosynthetic pathway represses transcription. b. The product of the biosynthetic pathway activates transcription. c. A precursor of the biosynthetic pathway represses transcription. d. A precursor of the biosynthetic pathway activates transcription.
What is an operon ? a. A series of genes controlled by the same operator b. A series of genes on the same mRNA molecule c. A series of genes that all have the same function d. A series of genes all regulated by the same repressor
You are growing E. coli in a laboratory in order to study their operons. The growth media you are using contains lactose, no glucose and no tryptophan. Using your knowledge of operons and their regulation a.Which operons would be functional under these conditions? b.What repressors would be made? (NOTE: name the repressors using their gene names) c.Which repressor(s) would be made in the inactive form? d.Which repressor(s) would be made in the active form? e.Which repressor(s) under these conditions can bind the operator sequence? f.Which repressor(s)under these conditions cannot bind the operator sequence?
Which of the following statements uses the term homologous correctly?A. The two X chromosomes in female mammalian cells are homologousto each other.B. The α-tubulin gene in Saccharomyces cerevisiae is homologousto the α-tubulin gene in Arabidopsis thaliana.C. The promoter of the lac operon is homologous to the promoterof the trp operon.D. The lacY genes of E. coli and K. pneumoniae are approximately60% homologous to each other.
A mutation in the operator region of the trp operon can prevent the trp repressor from binding to this operator. When these mutant cells are placed in a solution containing chicken broth, which of the following happens? a. Tryptophan would bind to the repressor. b. The Repressor would bind to the operator irrespective of the presence of amino acids in the environment. c. The transcription of the trip operon would be inhibited. d. The transcription of the repressor protein is inhibited
The gad operon is controlled by a number of transcription factors that regulate a promoter of approximately 450bp. Which would NOT explain why bacterial promoters are shorter than the typical eukaryotic promoter? a. Bacteria do not have nucleosomes b. Bacteria do not have mediator complex c. Each operon is regulated by only one signal d. All of the above are true
In the trp operon, what happens to the trp repressor in the absence of tryptophan? a. It binds to the operator and represses transcription. b. It cannot bind to the operator, and transcription takes place. c. It binds to the regulator gene and represses transcription. d. It cannot bind to the regulator gene, and transcription takes place.