If you have an operon containing genes that code for proteins that will aid the cell...
- If you have an operon containing genes that code for proteins that will aid the cell in utilizing sucrose for energy, what type of operon is it?
Homework Answers
The sucrose operon will be identical to the lac operon because the first step in the utilisation of sucrose is to breakdown the sucrose to fructose and glucose. Hence it will be similar to that of lac operon as lactose also is a disaccharide and it breaks down into glucose and galactose. Hence the sucrose operon will be regulated in negative repressible way. The inducer here will be sucrose and it also will be positively controlled by the cAMP-CRP complex similar to that of the lac operon. The structural genes will be sucrase gene, proteins that aid in sucrose intake by cells and also a leaky sucrose or an analog of sucrose. Hence the type of operon that sucrose will be a negative repressible operon.
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If you have an operon containing genes that code for proteins
that will aid the cell...
Describe in detail two ways in which transcription of the trp operon (containing genes used for...
Describe in detail two ways in which transcription of the trp operon (containing genes used for biosynthesis of trypotophan) and lac operon (containing genes used for digestion of lactose) are regulated differently. Include what types of proteins/ligands are regulating each operon, and how the various components interact. Diagrams may be helpful to your explanation.
Contrast the concepts of 'housekeeping' genes (and proteins) from the cell-specific genes (and proteins) that characterize...
Contrast the concepts of 'housekeeping' genes (and proteins) from the cell-specific genes (and proteins) that characterize and define a differentiated cell type. Propose an experiment that would distinguish the tissue-specific gene expression from housekeeping gene expression in muscle cells
26. The lac operon in E. coli consists of genes that code for enzymes necessary for...
26. The lac operon in E. coli consists of genes that code for enzymes necessary for the breakdown of lactose. When lactose is absent, the operon is inactive because a repressor protein binds to a specific site in the lac operon. When lactose is present, lactose molecules bind to the repressor protein, causing the repressor protein to dissociate from the binding site. In the absence of glucose (a preferred energy source for bacteria), the protein CAP binds to a regulatory...
for 1-5 define those The Lac operon is an inducible set of genes found in bacteria...
for
1-5 define those
The Lac operon is an inducible set of genes found in bacteria cells that helps the bacteria to metabolize the disaccharide lactose. When it is turned on it produces proteins that pump lactose into the bacteria cell and break it down into glucose and galactose, which can then be used by the bacteria as a source of energy The two figures below show the Lac Operon along with the lacl gene (which regulates the Lac operon...
What type of environment do you think the lactase-persistent gene (genes code for proteins/enzymes) came from?...
What type of environment do you think the lactase-persistent gene (genes code for proteins/enzymes) came from? In other words, what type of environment would be able to digest lactose be advantageous?
An operon in E. coli called the Pur operon, encodes proteins responsible for purine biosynthesis. Two...
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Cancer biologists have focused on proteins/genes associated with the "restriction point" of the cell cycle to...
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Notice that the genes for lysogeny are clustered in an operon on the "left" side of...
Notice that the genes for lysogeny are clustered in an operon on
the "left" side of the phage plasmid, while the genes for lysis are
clustered in an operon on the "right" side of the plasmid.
At the beginning of each infection, transcription begins at two
"early" promoters.
"Leftward" genes
Early promoter PLcontrols leftward
transcription of early genes, beginning with the N gene.
The N protein plays an anti-termination role in transcription from
PL. Leftward transcription is also enhanced by...
1. How do prokaryotes conserve energy? 2. How do DNA-binding proteins in prokaryotes regulate genes? 3....
1. How do prokaryotes conserve energy? 2. How do DNA-binding proteins in prokaryotes regulate genes? 3. What is an operon? 4. What is in the lac operon in E. coli? 5. What is the function of the genes in the lac operon of E. coli? 6. What turns the lac operon off? 7. How does a repressor protein turn off the lac operon? 8. How does lactose turn on the lac operon?
Why would a bacteria cell benefit from expressing the lac operon only in the presence of...
Why would a bacteria cell benefit from expressing the lac operon only in the presence of lactose? 1. The cell benefits by limiting the energy spent on the expression of the lac operonA. 2. The cell needs the lac operon to be expressed in order to obtain energy from lactose. 3. The cell doesn’t benefit, it would be better if the lac operon were expressed all of the time. 4.The production of lac operon proteins requires energy, but their production...
26. The lac operon in E. coli consists of genes that code for enzymes necessary for the breakdown of lactose. When lactose is absent, the operon is inactive because a repressor protein binds to a specific site in the lac operon. When lactose is present, lactose molecules bind to the repressor protein, causing the repressor protein to dissociate from the binding site. In the absence of glucose (a preferred energy source for bacteria), the protein CAP binds to a regulatory...
for
1-5 define those
The Lac operon is an inducible set of genes found in bacteria cells that helps the bacteria to metabolize the disaccharide lactose. When it is turned on it produces proteins that pump lactose into the bacteria cell and break it down into glucose and galactose, which can then be used by the bacteria as a source of energy The two figures below show the Lac Operon along with the lacl gene (which regulates the Lac operon...
Notice that the genes for lysogeny are clustered in an operon on
the "left" side of the phage plasmid, while the genes for lysis are
clustered in an operon on the "right" side of the plasmid.
At the beginning of each infection, transcription begins at two
"early" promoters.
"Leftward" genes
Early promoter PLcontrols leftward
transcription of early genes, beginning with the N gene.
The N protein plays an anti-termination role in transcription from
PL. Leftward transcription is also enhanced by...
1. How do prokaryotes conserve energy? 2. How do DNA-binding proteins in prokaryotes regulate genes? 3. What is an operon? 4. What is in the lac operon in E. coli? 5. What is the function of the genes in the lac operon of E. coli? 6. What turns the lac operon off? 7. How does a repressor protein turn off the lac operon? 8. How does lactose turn on the lac operon?
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