Homework Answers
- Negative Repressible
In this scenario, in the absence of the when the cofactor is bound to the repressor, the operon is switched off. Only when cofactor is released, the operon is expressed. In a repressor mutant, unable to bind the cofactor, no repressor is bound to the operon and expression is constitutive.
This requirement of cofactor to bind to the repressor molecule is a defining feature of Negative Repressible operons, where the operon is repressed in the presence of a cofactor, while whn the cofator is absent, repressor is not boun to the DNA and expression is 'on'.
Add Answer to:
Question 20 1 pts In a case where there is a mutation that prevents the cofactor...
In a case where there is a mutation that prevents the cofactor from binding to the...
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 inducible negative repressible positive inducible positive repressible
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
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 →
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...
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 1 (1 point) The sunshine operon regulates a series of genes that help one respond...
Question 1 (1 point) The sunshine operon regulates a series of genes that help one respond favorably to warm weather and sunlight. The regulator of this operon is usually bound to DNA, but becomes inactive (i.e., it falls off the DNA) when a small molecule binds to it that inactivates its DNA binding properties. What is the term for the type of regulatory control of this operon? Repressible Inducible Constitutive Catabolic Photophobic Question 2 (1 point)
Question 12 2 pts What is the role of CAMP in regulation of the lactose operon?...
Question 12 2 pts What is the role of CAMP in regulation of the lactose operon? CAMP is a repressor of the lactose operon and turns off gene expression of the lactose operon CAMP is an activator and prevents the repressor protein from binding to the operator region of the operon which allows for the lactose operon to be turned "on". 5 CAMP is an inducer of the lactose operon and also an activator since it prevents the repressor protein...
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...
For Questions 4-18, consider the mutations described in the left-hand column below. Identify whether the Lac operon will be ON or OFF in each of the environments listed across the top. The expression...
For Questions 4-18, consider the mutations described in the left-hand column below. Identify whether the Lac operon will be ON or OFF in each of the environments listed across the top. The expression of the normal (wild type) operon is given. Note that "ON" and "OFF" refer to whether the operon is expressed at high levels (ON) or basal//low/no levels (OFF). (Hint: mutations render the indicated site inactive while leaving the remaining part of the operon or protein functional.) Note...
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 inducible negative repressible positive inducible positive repressible
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
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 →
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...
Question 1 (1 point) The sunshine operon regulates a series of genes that help one respond favorably to warm weather and sunlight. The regulator of this operon is usually bound to DNA, but becomes inactive (i.e., it falls off the DNA) when a small molecule binds to it that inactivates its DNA binding properties. What is the term for the type of regulatory control of this operon? Repressible Inducible Constitutive Catabolic Photophobic Question 2 (1 point)
Question 12 2 pts What is the role of CAMP in regulation of the lactose operon? CAMP is a repressor of the lactose operon and turns off gene expression of the lactose operon CAMP is an activator and prevents the repressor protein from binding to the operator region of the operon which allows for the lactose operon to be turned "on". 5 CAMP is an inducer of the lactose operon and also an activator since it prevents the repressor protein...
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...
For Questions 4-18, consider the mutations described in the left-hand column below. Identify whether the Lac operon will be ON or OFF in each of the environments listed across the top. The expression of the normal (wild type) operon is given. Note that "ON" and "OFF" refer to whether the operon is expressed at high levels (ON) or basal//low/no levels (OFF). (Hint: mutations render the indicated site inactive while leaving the remaining part of the operon or protein functional.) Note...
Most questions answered within 3 hours.
-
if a firm producing 100 units at $5.00 each experience
an 80% experience curve, what will...
asked 30 seconds ago -
A solid, uniform disk of radius 0.250 m and mass 53.7 kg rolls
down a ramp...
asked 2 hours ago -
Given the following table of high speed internet access vs.
annual home income:
Home Income
%...
asked 2 hours ago -
A baseball batter hits a 0.145kg baseball straight up into the
air. The baseball leaves the...
asked 3 hours ago -
An FM modulator is tested using
single-tone baseband signal with frequency of 50kHz and a sprectrum...
asked 3 hours ago -
Write the ionic equations for the first stage of salts
hydrolysis.
Anion, Cation?
Na2S
NiSO4
K2SO4...
asked 5 hours ago -
suppose there is a normally distributed population with a mean of
250 and a standard deviation...
asked 5 hours ago -
Question Three
Suppose you as project manager are using the Waterfall
development methodology on a large...
asked 6 hours ago -
Which statement is not true about welfare in Canada?
A.Benefits typically vary based on one's ability...
asked 7 hours ago -
Please help me with FLOWCHART and UML diagram for class,
thank you!
#include <iostream>
#include <fstream>...
asked 8 hours ago -
3. Describe the “logic circuit” of the Lac operon. Which
proteins are bound or not to...
asked 8 hours ago -
Ayesha’s adjusted gross income is $60,000 in 2019. She donated a
piece of artwork with a...
asked 8 hours ago