Homework Answers
The strains which are defective repressor which is positive one, are constitutive and makes the encoded enzyme with the help of lac operon though the inducer is absent
inducer are non inducible that is negative inducible do not show the interaction with strain repressor. Though the inducer will fail to bind the repressor be with the operator and helps in preventing expression of the operon even inducer is present.
This makes the option negative repressible correct.
Add Answer to:
In a case where there is a mutation that prevents the cofactor from binding to the...
Question 20 1 pts In a case where there is a mutation that prevents the cofactor...
Question 20 1 pts In a case where there is a mutation that prevents the cofactor from binding to the repressor, and the result is that the operon is expressed constitutively. The original type of control in the operon was: negative repressible negative inducible positive repressible positive inducible Previous Nexo
Question 8 Imagine a repressible operon (such as trp we discussed). Further imagine that a mutation...
Question 8 Imagine a repressible operon (such as trp we discussed). Further imagine that a mutation of a regulatory gene prevents repressor from binding with a corepressor. What will be the status of that operon? Always on Operon will function normally Always off Operon will switch from repressible to inducible mode of regulation
1) The lac operon is… a) Positive repressible b) Both negative inducible and positive repressible c)...
1) The lac operon is… a) Positive repressible b) Both negative inducible and positive repressible c) Positive inducible d) Negative inducible 2) An activator regulatory protein… a) Is involved in negative regulatory control b) Is a cis acting regulatory element c) Recruits RNA polymerase to the promoter d) Prevents RNA polymerase from binding the promoter 3) For the lac operon, the presence of the substrate (lactose) activates the repressor. True or False? a) true b) false 4) cAMP… a) Activates...
Which of the following statements is correct concerning operon gene control? Positive control requires an activator...
Which of the following statements is correct concerning operon gene control? Positive control requires an activator protein to stimulate transcription of the structural genes within an operon. In negative control, a repressor protein inhibits or turns off transcription of the structural genes within the operon. An inducible operon normally is not transcribed. It requires an inducer molecule to stimulate transcription either by inactivating a repressor protein in a negative inducible operon or by stimulating the activator protein in a positive...
There are several possible mutations in the trp operon: trpP -is a mutation in the promoter...
There are several possible mutations in the trp operon:
trpP -is a mutation in the promoter sequence
that prevents RNA polymerase from binding to the promoter and
initiate transcription of the trp operon genes.
trpOcis a mutation in the operator sequence
that prevents the trp repressor protein from binding to
the operator to block transcription of the trp operon
genes.
trpR-is a mutation in the repressor protein
that either prevents repressor protein from being made or produces
a mutant repressor...
Below is a merozygote for components in the lac operon. A plus/positive sign (+) indicates a...
Below is a merozygote for components in the lac operon. A plus/positive sign (+) indicates a normal ‘wild type’ version of a sequence. A negative sign (-) ,C or S, indicates a mutant form of the sequence. lacIS lacP+ lacOc lacZ+ lacY+ lac A+/(plasmid) lacI- lac P+ lacO+ lac Z+ lacY+ lac A+ The operon on the plasmid is inducible, repressible, permanently off, or constitutively expressed?
Complete this quiz after watching the Gene regulation chapter 14 1 and 2 videos. We cover...
Complete this quiz after watching the Gene regulation chapter 14 1 and 2 videos. We cover only Lac operon. Question 2 1 pts Which statement best describes the lac operon in E.coli? o Constitutively expressed genes ( always "on") O Negative transcriptional control of inducible genes ( turned "off" until turned "on") O Positive transcriptional control of repressible genes ("on" until tuned "off") - Previous Next →
A mutation in the operator of the trp operon prevents the repressor to bind to the...
A mutation in the operator of the trp operon prevents the repressor to bind to the operator, even in the presence of tryptophan. What is true with respect to the bacteria carrying this mutation? Select one: a. The bacteria will transcribe the genes of the trp operon even when tryptophan is present in the environment b. Tryptophan would not be able to bind to the repressor protein c. Small amounts of tryptophan will be lethal for the bacteria d. The...
QUESTION 8 The following situations (1-4) involve different types of gene regulation in prokaryotic cells as shown. OFF...
QUESTION 8 The following situations (1-4) involve different types of gene regulation in prokaryotic cells as shown. OFF and ON reter to whether the gene is transcribed or not. Draw clearly-labelled regulatory proteins and effector molecules in each diagram to explain how the regulation works in each case. The first one has been done for you as an example a) (6 marks) Type of Regulation Regulatory protein effector molecule 1 DNA X negative inducible OFF ON 2 negative repressible DNA...
1. (1 pt) If a gene is repressible and under positive control, A. Is the regulatory...
1. (1 pt) If a gene is repressible and under positive control, A. Is the regulatory protein an activator or repressor? B. Explain how an effector molecule, which binds to the regulatory protein, alters the regulatory protein’s ability to regulate expression of the gene. 2. (1 pt) Cis and trans are two terms used to describe mutations. A. Explain the molecular difference between these terms. B. indicate which type of mutation (cis or trans) is dominant to wild-type and which...
Question 20 1 pts In a case where there is a mutation that prevents the cofactor from binding to the repressor, and the result is that the operon is expressed constitutively. The original type of control in the operon was: negative repressible negative inducible positive repressible positive inducible Previous Nexo
Question 8 Imagine a repressible operon (such as trp we discussed). Further imagine that a mutation of a regulatory gene prevents repressor from binding with a corepressor. What will be the status of that operon? Always on Operon will function normally Always off Operon will switch from repressible to inducible mode of regulation
Which of the following statements is correct concerning operon gene control? Positive control requires an activator protein to stimulate transcription of the structural genes within an operon. In negative control, a repressor protein inhibits or turns off transcription of the structural genes within the operon. An inducible operon normally is not transcribed. It requires an inducer molecule to stimulate transcription either by inactivating a repressor protein in a negative inducible operon or by stimulating the activator protein in a positive...
There are several possible mutations in the trp operon:
trpP -is a mutation in the promoter sequence
that prevents RNA polymerase from binding to the promoter and
initiate transcription of the trp operon genes.
trpOcis a mutation in the operator sequence
that prevents the trp repressor protein from binding to
the operator to block transcription of the trp operon
genes.
trpR-is a mutation in the repressor protein
that either prevents repressor protein from being made or produces
a mutant repressor...
Complete this quiz after watching the Gene regulation chapter 14 1 and 2 videos. We cover only Lac operon. Question 2 1 pts Which statement best describes the lac operon in E.coli? o Constitutively expressed genes ( always "on") O Negative transcriptional control of inducible genes ( turned "off" until turned "on") O Positive transcriptional control of repressible genes ("on" until tuned "off") - Previous Next →
A mutation in the operator of the trp operon prevents the repressor to bind to the operator, even in the presence of tryptophan. What is true with respect to the bacteria carrying this mutation? Select one: a. The bacteria will transcribe the genes of the trp operon even when tryptophan is present in the environment b. Tryptophan would not be able to bind to the repressor protein c. Small amounts of tryptophan will be lethal for the bacteria d. The...
QUESTION 8 The following situations (1-4) involve different types of gene regulation in prokaryotic cells as shown. OFF and ON reter to whether the gene is transcribed or not. Draw clearly-labelled regulatory proteins and effector molecules in each diagram to explain how the regulation works in each case. The first one has been done for you as an example a) (6 marks) Type of Regulation Regulatory protein effector molecule 1 DNA X negative inducible OFF ON 2 negative repressible DNA...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago