Homework Answers
Add Answer to:
The gene machine program shows you what happens when lactose is present in E. coli, and...
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...
What happens to the expression of the Lac gene of E. coli if the following conditions...
What happens to the expression of the Lac gene of E. coli if the following conditions occur? For each condition below, mark an X in the column labelled Activated or Repressed, then explain why you chose that answer. Please assume the glucose levels are low in the cell. The first row is done for you. Activated a Repressed b Explain your answer Repressor, Lactose, and RNA polymerase are all present in abundance X Repressor binds to lactose so it can...
gene regulation of bacteria operon systems. Protected View . Saved to this PG References Mailings Review...
gene regulation of bacteria operon systems. Protected View . Saved to this PG References Mailings Review View Help Tell me what you want to do ernet can contain viruses. Unless you need to edit, it's safe to stay in Protected View Enable Editing 5. What happens if lactose levels are low? Put the following list in order (1-5). RNA polymerase is blocked from transcribing the genes for the lactose metabolizing enzymes When RNA polymerase binds to the promoter, it cannot...
1) Which of the following conditions is most likely to cause the lactose operon to be...
1) Which of the following conditions is most likely to cause the lactose operon to be transcribed? A) There is more glucose in the cell than lactose. B) There is glucose but no lactose in the cell. C) The cyclic AMP and lactose levels are both high within the cell. D) The CAMP level is high and the lactose level is low. 2) How does the transcription of structural genes in an inducible operon occur? A) It occurs continuously in...
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...
Fill in the blanks in the following sentences by selecting from the drop-down menus. When E.coli...
Fill in the blanks in the following sentences by selecting from the drop-down menus. When E.coli cells are grown in the presence of high glucose and high lactose, the lac repressor is not bound to the lac operator, CAMP levels in the cell are high and CAP is mostly bound to the CAP binding site in the lac promoter. Under these conditions, transcription of the lac operon Select When E.coli cells are grown in the absence of glucose and presence...
In E coli the lac operon will express enzymes for the digestion of (Glucose/Lactose) when it...
In E coli the lac operon will express enzymes for the digestion of (Glucose/Lactose) when it is present, but if both the sugar mentioned before and (Glucose/ Lactose) are present the lac operon is repressed, resulting in the (Glucose/ Lactose) being used first. If there are high levels of cAMP, this means (Glucose/Lactose) levels are low, this results in a (Represser/Promoter) being activated and (Decreasing/Increasing) transcription of the lac operon.
A number of mutations affect the expression of the lactose operon in E. coir. I^- a...
A number of mutations affect the expression of the lactose operon in E. coir. I^- a mutant lac repressor that cannot bind the lac operator I^s a mutant lac repressor that cannot bind lactose O^c a mutant lac operator that cannot bind repressor Lacl P^- a mutant lac promoter that cannot bind RNA polymerase Z^- a mutant lacZ lost beta-galactosidase activity Y^- a mutant permease that cannot transport lactose into the cell Consider the following strains each with the indicated...
Consider an E. coli strain carrying a mutation in crp (encoding the catabolite activator protein) that...
Consider an E. coli strain carrying a mutation in crp (encoding the catabolite activator protein) that prevents CAP from binding CAMP. Predict whether the repressor and the activator is active (able to bind to DNA) or inactive (unable to bind to DNA), and the level of transcription in the following scenarios. Options for transcription levels include high, medium, leaky and off. a. When lactose is present but glucose is not, the repressor is and the activator is leading to levels...
Yet, all the cells in your body contain the same genes (and same alleles). The difference...
Yet, all the cells in your body contain the same
genes (and same alleles). The difference across cell types
is that genes get selectively expressed (turned on or off)
based on the proteins needed for cellular function given their
environment.
Select which statement explains the reason why hair does not
normally grow on your muscle cells.
a.
Muscle cells have the gene for keratin, but do not express
it
b.
Muscle cells do not have the gene for keratin and...
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...
gene regulation of bacteria operon systems. Protected View . Saved to this PG References Mailings Review View Help Tell me what you want to do ernet can contain viruses. Unless you need to edit, it's safe to stay in Protected View Enable Editing 5. What happens if lactose levels are low? Put the following list in order (1-5). RNA polymerase is blocked from transcribing the genes for the lactose metabolizing enzymes When RNA polymerase binds to the promoter, it cannot...
1) Which of the following conditions is most likely to cause the lactose operon to be transcribed? A) There is more glucose in the cell than lactose. B) There is glucose but no lactose in the cell. C) The cyclic AMP and lactose levels are both high within the cell. D) The CAMP level is high and the lactose level is low. 2) How does the transcription of structural genes in an inducible operon occur? A) It occurs continuously in...
Fill in the blanks in the following sentences by selecting from the drop-down menus. When E.coli cells are grown in the presence of high glucose and high lactose, the lac repressor is not bound to the lac operator, CAMP levels in the cell are high and CAP is mostly bound to the CAP binding site in the lac promoter. Under these conditions, transcription of the lac operon Select When E.coli cells are grown in the absence of glucose and presence...
A number of mutations affect the expression of the lactose operon in E. coir. I^- a mutant lac repressor that cannot bind the lac operator I^s a mutant lac repressor that cannot bind lactose O^c a mutant lac operator that cannot bind repressor Lacl P^- a mutant lac promoter that cannot bind RNA polymerase Z^- a mutant lacZ lost beta-galactosidase activity Y^- a mutant permease that cannot transport lactose into the cell Consider the following strains each with the indicated...
Consider an E. coli strain carrying a mutation in crp (encoding the catabolite activator protein) that prevents CAP from binding CAMP. Predict whether the repressor and the activator is active (able to bind to DNA) or inactive (unable to bind to DNA), and the level of transcription in the following scenarios. Options for transcription levels include high, medium, leaky and off. a. When lactose is present but glucose is not, the repressor is and the activator is leading to levels...
Yet, all the cells in your body contain the same
genes (and same alleles). The difference across cell types
is that genes get selectively expressed (turned on or off)
based on the proteins needed for cellular function given their
environment.
Select which statement explains the reason why hair does not
normally grow on your muscle cells.
a.
Muscle cells have the gene for keratin, but do not express
it
b.
Muscle cells do not have the gene for keratin and...
Most questions answered within 3 hours.
-
Thermal Storage Solar heating of a house is much more efficient
if there is a way...
asked 1 minute from now -
Considering the “fits” for group and job design dimensions,
suppose you had 12 employees with different...
asked 6 minutes ago -
Consider TCP connection management.
How many segments are typically involved in the TCP connection
establishment? What...
asked 16 minutes ago -
1. You placed a stop-loss order to sell 500 shares of AAPL with
a stop price...
asked 24 minutes ago -
Sylva Warehousing desired to locate a central warehouse to serve
five North Carolina markets. Placed on...
asked 25 minutes ago -
A regression was run to determine if there is a relationship
between hours of TV watched...
asked 33 minutes ago -
The theoretical yield of a reaction is the amount of product
obtained if the limiting reactant...
asked 41 minutes ago -
You are an intern at a leading investment bank. Your manager
assigned you a project to...
asked 38 minutes ago -
Please explain how to determine polarity for me.
Rank the following covalent bonds by decreasing
polarity....
asked 41 minutes ago -
1. Express the confidence interval 86.5%±4.6% in interval
form
2. Assume that a sample is used...
asked 57 minutes ago -
Suppose in the short run a firm’s production function is given
by Q = L1/2*K1/2, and...
asked 1 hour ago -
Calculation of number of protons, neutrons , and electrons
If given the mass # of 74...
asked 1 hour ago