Homework Answers
B. There would be over expression of the operon because it would not be repressible.
Add Answer to:
Lac Operon Homework . Unanswered How would a mutation in the lacy gene effect the lac...
Briefly explain your answers to the following questions. A mutation (Mutation A) in the lac operon...
Briefly explain your answers to the following questions. A mutation (Mutation A) in the lac operon of E. coli leads to an inability to ferment lactose, and the expression of the operon is always off. Introduction into the mutant of an F' factor containing the wild type lac operon does NOT restore the ability to ferment lactose, i.e., there is no expression of the operon from the plasmid either. a. What is the probable nature of Mutation A? Is the...
A particular gene (call it xyz) is, like the lac operon, regulated both by Negative and...
A particular gene (call it xyz) is, like the lac operon, regulated both by Negative and by Positive control. However, unlike the lac operon, xyz's Negative control system is repressible. We'll call the repressor signal "signal 1." The Positive control system of xyz, like that of lac, is inducible. We'll call the inducer "signal 2." I want you to sketch the xyz gene in the presence and absence of each signal, as follows, and then determine whether the xyz gene...
Most of what we know about the lac operon in E. coli has come from the...
Most of what we know about the lac operon in E. coli has come from the genetic analysis of various mutants. Below is a list of mutants for regions of the operon. A + superscript indicates no mutation and normal function of that region, - indicates a knock out and no function of that region, c indicates the mutation resulted in constitutive action of that region. The effect of the mutation is determined by expression of the lacZ gene as...
Gene Regulation Describe the regulation of the lac operon in E. coli. a. the structure of...
Gene Regulation Describe the regulation of the lac operon in E. coli. a. the structure of lac operon in E.coli. b. Role of CAP and cAMP the activator binding site c. Role of Lac Repressor and Operator and Inducer d. Role of Looping e. Effect of mutations f. Recessive v dominant mutations g. Complementing v noncomplementing mutations. Describe the regulation of the trp operon in E. coli. Describe at least three kinds of molecular switches involved in gene regulation. What...
A mutation occurs in the operator of the Lac Operon. Because of this mutation, the Lac...
A mutation occurs in the operator of the Lac Operon. Because of this mutation, the Lac Repressor is unable to bind to the operator. If a bacterial cell contained this mutation, would the Lac operon be transcribed at a high rate (be on) or off under the following conditions: Write on or off in the blank next to each of the conditions. + glucose + lactose ________ + glucose - lactose ________ - glucose + lactose ________ - glucose -...
In this problem you will explore how to solve problems involving partial diploid lac operon bacterial...
In this problem you will explore how to solve problems involving partial diploid lac operon bacterial strains. Bacterial strains that are "partially diploid" have two copies of the lac operon because they aquired a plasmid carrying just the lac operon region. One copy of the lac operon region is on the recipient's bacterial chromosome, and the other copy is on the P plasmid that was introduced into the cell by conjugation. Partial diploid genotypes are written with the P segment...
Complete the comparison of the lac Operon and trp Operons as a means of gene regulation.
ACTIVITY #2: Operon control of gene expressionComplete the comparison of the lac Operon and trp Operons as a means of gene regulation. lac operorn trp operon Regulates production of Name of Regulatory gene" and what it produces What binds to the operator & when does this occur: Structural genes controlled by the operon and how their expression is controlled: High levels of what substance affects the operon how?
4. Nutritional status, mutation, and expression of the lac operon. For each of the following conditions,...
4. Nutritional status, mutation, and expression of the lac operon. For each of the following conditions, indicate how much (a lot, a little, or none) of the lacZ gene (z-gene) product, beta- galactosidase, is being synthesized. NUTRITIONAL STATUS OF THE BACTERIA +lactose/-glucose +lactose/+glucose -lactose/+glucose genetic status normal (no mutation) mutation a mutation b mutationc important: these are nor the same mutations as the ones in your class handout mutation a: a mutation in the start codon for the lacA (A-gene)...
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
Predict the phenotype of a lac Y mutant, which is a mutation in the gene for...
Predict the phenotype of a lac Y mutant, which is a mutation in the gene for lactose permease. a. The lac genes would be expressed efficiently only in the absence of lactose. b. The lac genes would be expressed efficiently until the lactose supply already in the cell is exhausted. c. The lac genes would be expressed continuously. d. Expression of the lac genes would cease immediately.
In this problem you will explore how to solve problems involving partial diploid lac operon bacterial strains. Bacterial strains that are "partially diploid" have two copies of the lac operon because they aquired a plasmid carrying just the lac operon region. One copy of the lac operon region is on the recipient's bacterial chromosome, and the other copy is on the P plasmid that was introduced into the cell by conjugation. Partial diploid genotypes are written with the P segment...
4. Nutritional status, mutation, and expression of the lac operon. For each of the following conditions, indicate how much (a lot, a little, or none) of the lacZ gene (z-gene) product, beta- galactosidase, is being synthesized. NUTRITIONAL STATUS OF THE BACTERIA +lactose/-glucose +lactose/+glucose -lactose/+glucose genetic status normal (no mutation) mutation a mutation b mutationc important: these are nor the same mutations as the ones in your class handout mutation a: a mutation in the start codon for the lacA (A-gene)...
Most questions answered within 3 hours.
-
3. A two-workstation cell uses a kanban system to produce
200,000 parts per year. Expected leadtime...
asked 3 seconds from now -
Let Y1,…, Y18 be a random sample from a uniform distribution on
the interval (0, θ],...
asked 4 minutes ago -
Two charges q1 = −3.20 nC and q2 = +8.42 nC are at a distance of...
asked 6 minutes ago -
in
a survey of 1433 people,909 people said they voted in a recent
presidential election.Voting records...
asked 6 minutes ago -
The factor of incentive scheme fail is because of rewards
rupture relationships. Explains
(in 300 words)
asked 24 minutes ago -
Given an operating system that supports a one-to-one
relationship between user-level threads and kernel-level threads
and...
asked 30 minutes ago -
1-7. Identify the initiation, propagation, and termination steps
for the following accident report. Suggest ways to...
asked 31 minutes ago -
How many photons are produced in a laser pulse of .125 J at 523
nm
asked 33 minutes ago -
how did government respond to the crash of 1929 and
financial crisis of 2008. Please provide...
asked 31 minutes ago -
An electrochemical cell consists of a Pt|H+(aq,1.00
M)|H2(g) cathode connected to a
Pt|H+(aq)|H2(g) anode in which...
asked 35 minutes ago -
Approximately 3.9 x 106 kg of water falls 65 m over a waterfall
each second. (a)...
asked 37 minutes ago -
Python Assignment: Write a program that uses stacks to solve
postfix equations.Read the below in a...
asked 54 minutes ago