4. Briefly draw and/or describe the functions of the genes contained in the lac operon. Why...
4. Briefly draw and/or describe the functions of the genes contained in the lac operon. Why is a low level of lac operon expression necessary for it to respond to the presence of lactose ?
Homework Answers
Add Answer to:
4. Briefly draw and/or describe the functions of the
genes contained in the lac operon. Why...
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...
15. Describe the gene expression at the lac operon in the following conditions. Please discuss all...
15. Describe the gene expression at the lac operon in the following conditions. Please discuss all components involved and how they regulate the expression: a. Absence of glucose; presence of lactose b. Absence of lactose; presence of glucose
Lac Operon IPOZY v3 In the genotype presented (genomic plus plasmid genes), which of the following...
Lac Operon IPOZY v3 In the genotype presented (genomic plus plasmid genes), which of the following statements is consistent with the expression phenotype? genome: I+P+ O- Z+ Y- plasmid: I+ P- O+ Z- Y+ constitutive expression of β-gal and permease induced in the presence of lactose constitutive expression of β-gal only constitutive expression of β-gal and permease β-gal and permease induced in the presence of lactose constitutive expression of permease and β-gal induced in the presence of lactose
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...
Imagine you are carrying out research on the lac operon. You isolate six mutations in the...
Imagine you are carrying out research on the lac
operon. You isolate six mutations in the lac operon by
measuring the amount of beta-galactosidase made in mutant cell line
under three different conditions: no lactose/no glucose; lactose
only; and lactose/glucose. Your results are shown in the table.
Strain
No Lactose, No Glucose
Lactose
Lactose, Glucose
Wild-type
None
High
Low
Mutant 1
None
None
None
Mutant 2
None
None
None
Mutant 3
None
Low
Low
Mutant 4
None
Low
Low
Mutant...
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...
5. Briefly describe positive control in the lac operon when glucose is absent and lactose is...
5. Briefly describe positive control in the lac operon when glucose is absent and lactose is present in high amounts.
1. Describe how bacteria regulate genes through operons. 2. What is the difference between a repressible...
1. Describe how bacteria regulate genes through operons. 2. What is the difference between a repressible and inducible genetic system? 3. Expression of the Lac operon is under the controls of (1) the Lacl repressor and (2) CAP. Consider each of the following conditions and determine which factors will be acting on the operon. Predict the rate of gene expression. Conditions Lac Operon fon" or "off" CAP present" or "absent" at Lac Operon Predict the rate of gene expression (none,...
In the table below, predict (yes or no) whether or not the E. coli lac operon...
In the table below, predict (yes or no) whether or not the E. coli lac operon will be transcriptionally active in the presence or absence of glucose or lactose as indicated and respond to questions "a" and "b." (20 points) Lactose Glucose Lac expression? No Yes NO Yes Yes NO Yes No YES 1) Explain each of your answers in terms of the molecular mechanisms that are known to underlie the regulation of the lac operon. 2) Which mechanism is...
a) For the lac operon, will the repressor or RNA polymerase be bound to the operon in this situation? Draw what wil...
a) For the lac operon, will the repressor or RNA polymerase be bound to the operon in this situation? Draw what will be happening on the operon below. PROMOTER OPERATOR Lactose Enzyme 1 Lsctose Enzyme2 Lactose Enzyme 3 NO b) Will transcription occur? c) Describe what is happening (with vocabulary words). YES 2. Bobby Joe is fasting today, how will the E. coli in her stomach respond to the lack of Tryptophan? a) For the trp operon, will the repressor...
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...
Imagine you are carrying out research on the lac
operon. You isolate six mutations in the lac operon by
measuring the amount of beta-galactosidase made in mutant cell line
under three different conditions: no lactose/no glucose; lactose
only; and lactose/glucose. Your results are shown in the table.
Strain
No Lactose, No Glucose
Lactose
Lactose, Glucose
Wild-type
None
High
Low
Mutant 1
None
None
None
Mutant 2
None
None
None
Mutant 3
None
Low
Low
Mutant 4
None
Low
Low
Mutant...
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...
5. Briefly describe positive control in the lac operon when glucose is absent and lactose is present in high amounts.
1. Describe how bacteria regulate genes through operons. 2. What is the difference between a repressible and inducible genetic system? 3. Expression of the Lac operon is under the controls of (1) the Lacl repressor and (2) CAP. Consider each of the following conditions and determine which factors will be acting on the operon. Predict the rate of gene expression. Conditions Lac Operon fon" or "off" CAP present" or "absent" at Lac Operon Predict the rate of gene expression (none,...
a) For the lac operon, will the repressor or RNA polymerase be bound to the operon in this situation? Draw what will be happening on the operon below. PROMOTER OPERATOR Lactose Enzyme 1 Lsctose Enzyme2 Lactose Enzyme 3 NO b) Will transcription occur? c) Describe what is happening (with vocabulary words). YES 2. Bobby Joe is fasting today, how will the E. coli in her stomach respond to the lack of Tryptophan? a) For the trp operon, will the repressor...
Most questions answered within 3 hours.
-
While rotating the tires on your car you notice a rock [mass =
0.1 Kg] stuck...
asked 42 minutes ago -
Using MARS simulator, write MIPS programs according to
the following scenarios: Receive a positive integer number...
asked 2 hours ago -
An object in front of a concave mirror has a real image that is
11.5 cm...
asked 2 hours ago -
Consider the reaction, C3 H8 + O2 --> CO2 + H2O. How many
moles of O2...
asked 4 hours ago -
You and your opponent both roll a fair die. If you both roll the
same number,...
asked 4 hours ago -
In a study of the accuracy of fast food drive-through orders,
Restaurant A had 257 accurate...
asked 4 hours ago -
Identify and describe in detail the four categories of
institutions that could be included in a...
asked 4 hours ago -
In python
class Customer:
def __init__(self, customer_id, last_name, first_name, phone_number, address):
self._customer_id = int(customer_id)
self._last_name =...
asked 5 hours ago -
What is an example of a limitation in implementing a new
ERP system and how it...
asked 4 hours ago -
In a section of 9.7cm of an artery with a radius of 2.6mm there
is a...
asked 4 hours ago -
the two carboxylic acid groups of aspartic acid have different
acidities with pKa values of 2.1...
asked 5 hours ago -
Would CuCO3 aqueous salt combined with calcium chloride
form a solid precipitate? If so, what would...
asked 5 hours ago