It makes more sense to make the repressor for the synthesis of enzymes that break down...
It makes more sense to make the repressor for the synthesis of enzymes that break down lactase in an active form, because
a.
E. coli does not always have access to lactose
b.
The statement is not true, the default for the repressor for the lac operon is that it is inactive
c.
Making the repressor in an inactive form is a good example of negative feedback.
d.
E. coli always needs energy.
Homework Answers
Option a is correct. Because e voli does not have always access to lactose.
Lactose operon is inducible operon. It produc beta galactosidase enzyme which involve in degradation of lactose.
Normal conditions-- glucose is present, lactose absent, it remains shut down . .
But whenever the is lactose present in medium- induction of lac operon.
So presence of lactose can give a hint about induction of operon. Which synthesize best galactosidase and cleave lactose.
Add Answer to:
It makes more sense to make the repressor for the synthesis of
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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
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based on the proteins needed for cellular function given their
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Select which statement explains the reason why hair does not
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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...
The Lac operon codes for enzymes that break down lactose so that bacteria can use it...
The Lac operon codes for enzymes that break down lactose so that bacteria can use it in cellular respiration. The repressor detects whether and prevents RNA polymerase from transcribing the operon • lactose is present lactose is absent glucose is present glucose is absent
The lac operon codes for enzymes that break down lactose, but this operon is only used...
The lac operon codes for enzymes that break down lactose, but this operon is only used when needed. This includes: 1. When the repressor is bound at the operator 2.When RNA polymerase is bound to the promotor WITHOUT the CAP molecule 3.When the CAP and cAMP molecules are bound to the RNA polymerase and lactose is bound to the repressor 4.When the CAP and cAMP molecules are bound to the RNA polymerase and lactose is NOT bound to the repressor
The lac operon contains a DNA sequence known as the lac promoter (P or P+ for...
The lac operon contains a DNA sequence known as the lac promoter (P or P+ for wild type; P– for mutant (RNA polymerase does not bind)) that serves as the RNA polymerase binding site. The lac operon also contains a DNA sequence known as the Lac operator (O or O+ for wild type; O– or Oc for mutant (lac repressor cannot bind)) which is the binding site for lac repressor. The lac repressor, a protein, is encoded by the lac...
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...
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...
A genetically engineered plasmid Ficarries all of the elements of the lac operon, but replaces the...
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thats all the information that he gave us to solve the question. Thank you for trying...
thats all the information that he gave us to solve the question.
Thank you for trying anyways
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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...
The Lac operon codes for enzymes that break down lactose so that bacteria can use it in cellular respiration. The repressor detects whether and prevents RNA polymerase from transcribing the operon • lactose is present lactose is absent glucose is present glucose is absent
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...
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...
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...
thats all the information that he gave us to solve the question.
Thank you for trying anyways
X C E Question 23 1 pts The free-energy changes for the transfer of individual amino acid residues from a hydrophobic to an aqueous environment are given as follows: Amino acid AG of transfer (kJ/mol Proline -0.8 -12.6 Histidine 6.7 Alanine Methionine 14.3 Based on this information, which of these amino acid pairs is MOST likely to be represented in membrane-spanning alpha helices?...
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