True/False questions Promoter is a protein that regulates transcription. True/False Bacterial genes are almost always part of operons. True/False RNA polymerase cannot bind to the promoter when repressor is bound to the operator. True/False Proteins are polymers of amino acids connected by phosphodiester bonds. True/False First amino acid of any protein is always methionine. True/False

True/False questions Promoter is a protein that regulates transcription. True/False Bacterial genes are almost always part of operons. True/False RNA polymerase cannot bind to the promoter when repressor is bound to the operator. True/False Proteins are polymers of amino acids connected by phosphodiester bonds. True/False First amino acid of any protein is always methionine. True/False

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 11TYU

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A: The solution to the above mentioned questions is as follows:

Question

True/False questions

Promoter is a protein that regulates transcription. True/False

Bacterial genes are almost always part of operons. True/False

RNA polymerase cannot bind to the promoter when repressor is bound to the operator. True/False

Proteins are polymers of amino acids connected by phosphodiester bonds. True/False

First amino acid of any protein is always methionine. True/False

Definition Definition Large and very high-molecular-weight substances that consist of hundreds to thousands of repeating units. Polymers are also known as macromolecules. Number-average-molecular weight is the measuring system for the polymers.

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The tryptophan operon of E. coli represents an example of a gene regulatory system which is: a repressible system (normally turned on, but can be repressed) a repressible system (normally repressed, but can be turned on) an activator system (normally turned off, but can be activated) an activator system (normally activated, but can be turned off) all of the above
more than one answer is correct
All the following are characteristics of inducible operons except they are normally inactive they involve a repressor they are often involved in anabolic pathways they are active in the presence of an inducer they are a way for bacterial cells to conserve energy
An operon is a group of genes under the control of a single promoter. Match each type of operon with the descriptions. Inducible Transcription stops when the repressor gene product is activated. Transcription occurs regardless of environmental conditions. Repressible Answer Bank Constitutive Sufficient amounts of the gene product inhibit further transcription. Transcription is turned on when a specific molecule is present.
Orca is a new type of E. Coli bacterium. Suppa is a nutrient that Orca needs to survive. Suppa can be synthesized by four (4) enzymes (SupA, SupB, SubC, and SupD) in its cell or it can acquire it from its environment. It only synthesizes it's own Suppa when it's really desperate, because there's none around! Draw and describe Orca's operon controlling its synthesis of Suppa.
Which of the following statements is false? a mutation in a 5' or 3' splice site must alter the sequence of the protein encoded by a gene a mutation in a transcriptional terminator is unlikely to alter the sequence of a protein encoded by a gene. a mutation in a promoter is unlikely to alter the sequence of the polypeptide encoded by a gene a missense mutations replaces one amino acid with a different amino acid a frameshift mutation changes the sequence of a protein 000 0
Please match the following definitions to the correct terms B-galactosidase [ Choose ] lactose permease [ Choose ] Lac I [ Choose ] Lac Y [ Choose ] operator [Choose ] Lạc Z [ Choose ] operon [ Choose ] trans-acting [ Choose ] cis-acting [ Choose ] negative regulation [ Choose ] > > > > > >
RNA interference is a mechanism of gene silencing that is mediated by the presence of double stranded RNA. Arrange the steps involved in gene silencing by RNAi.
Which of the following statements about operons are true? (Check all that apply) Operons are common in eukaryotes, but rare in prokaryotes. An operon encodes multiple (different) proteins. An operon encodes multiple (different) RNAs. An operon contains multiple promoters. The RNA produced from an operón contains more than one Shine-Dalgarno sequence. Operons often contain genes that function in a similar process so they are all turned on or turned off together. In other words, a mechanism to "coordinate" gene expression.
The following is a DNA sequence of gene Z. The underlined sequence represents the promoter for gene Z and the underlined and italicized sequence encodes the gene Z ribosome binding (RBS) site. Transcription begins at and includes the T/A base pair at position 60 (bold)
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
A mutation at the operator site of a positive inducible operon that causes the sequence of the operator to change, would result in: Group of answer choices Activator unable to bind to DNA, transcription turned on Activator binds to DNA, transcription turned off Activator binds to DNA, transcription turned on Activator unable to bind to DNA, transcription turned off