Differentiate between “inducible operon” and “repressible operon”. In your explanation, use the following terms: small molecules...
Differentiate between “inducible operon” and “repressible operon”. In your explanation, use the following terms: small molecules (inducer or co-repressor), activation or inactivation of regulatory protein (activator or repressor), transcriptional up-regulation or down-regulation.
Homework Answers
Inducible Operon is the one which is normally in switched off condition and gets induced or switched on in the presence of an inducer molecule.
The operator is the region which binds to repressor and prevents RNA polymerase from transcribing the Operon.
The inducer molecule acts as Activator. It binds to the repressor present at operator region and degrade it. It makes promoter free and therefore RNA polymerase is now able to transcribe the Operon. This is transcriptional upregulation.
The example of which type of Operon is lactose Operon.
Repressible Operon is the one which is normally in switched on condition and gets switched off in the presence of repressor molecule.
Whenever the repressor molecules present in the medium at appropriate concentration it binds to the the operator and prevents RNA polymerase from transcribing the Operon. This is called as transcriptional downregulation.
An example of this type of Operon is tryptophan operon.
Please rate.
Add Answer to:
Differentiate between “inducible operon” and “repressible
operon”. In your explanation, use the following terms: small
molecules...
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...
Transcriptional regulation in bacteria involves a combination of regulatory proteins, DNA sequences, and small effector molecules....
Transcriptional regulation in bacteria involves a combination of regulatory proteins, DNA sequences, and small effector molecules. Note the list of terms below: Activator +1 Inhibitor -10 Allolactose cAMP CAP Operator lacA Repressor lacZ Inducer a.Which of the terms describes or is an example of a regulatory protein? b.Which of the terms describes or is an example of a small effector molecule? c.Which of the terms describes of is an example of a sequence found within the DNA? d.Which of 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...
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...
please help me with the question 15 to 18. Basic structure of an operon Note that...
please help me with the question 15 to 18.
Basic structure of an operon Note that the diagram below is one section of DNA master strend with some areas of DNA labeled in blocks The bracketed area illustrates the basic parts of an operon repressor gene promoter operator structural genes DNA 3 mRNA 5 - 3 repressor protein shown attached to operator #2 Repressor preten "Use purple to color in the repressor gene. The repressor gene codes for a repressor...
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...
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...
8. In afictitious bacteria, an operon induced by the presence of compound Z. A diagram of...
8. In afictitious bacteria, an operon induced by the presence of compound Z. A diagram of this operon, its regulatory proteins and sites is show below gene X gene A gene B · 2x-promoter for the regulatory protein . X-gene for the regulatory protein · P = promoter for AB gene . S sequence important for regulation by compound Z A= structural gen e for enzymeA B-structural genefor enzyme B The following table shows thegenotypes of different strains of thefictitious...
A genetically engineered plasmid Ficarries all of the elements of the lac operon, but replaces the...
A genetically engineered plasmid Ficarries all of the elements of the lac operon, but replaces the structural genes with the reporter gene green fluorescent protein (GFP). The repressor allele cannot bind lactose, and the OC allele cannot be bound by the repressor. Given the following genotypes and growth media that does not contain glucose, indicate in the table below whether you expect to see b-galactosidase activity and glowing green colonies of E. coli by selecting Yes or No. growth media...
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...
please help me with the question 15 to 18.
Basic structure of an operon Note that the diagram below is one section of DNA master strend with some areas of DNA labeled in blocks The bracketed area illustrates the basic parts of an operon repressor gene promoter operator structural genes DNA 3 mRNA 5 - 3 repressor protein shown attached to operator #2 Repressor preten "Use purple to color in the repressor gene. The repressor gene codes for a repressor...
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...
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...
8. In afictitious bacteria, an operon induced by the presence of compound Z. A diagram of this operon, its regulatory proteins and sites is show below gene X gene A gene B · 2x-promoter for the regulatory protein . X-gene for the regulatory protein · P = promoter for AB gene . S sequence important for regulation by compound Z A= structural gen e for enzymeA B-structural genefor enzyme B The following table shows thegenotypes of different strains of thefictitious...
A genetically engineered plasmid Ficarries all of the elements of the lac operon, but replaces the structural genes with the reporter gene green fluorescent protein (GFP). The repressor allele cannot bind lactose, and the OC allele cannot be bound by the repressor. Given the following genotypes and growth media that does not contain glucose, indicate in the table below whether you expect to see b-galactosidase activity and glowing green colonies of E. coli by selecting Yes or No. growth media...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago