Question
In: Biology
Which of the following genes of the Lac operon encode cis-acting regulatory elements?
Which of the following genes of the Lac operon encode cis-acting regulatory elements?
Lacy
Lacl
None of these answers is correct
LacA
Lacz
Solutions
Expert Solution
Ans :-) option c. None of the answer is correct.
Cis acting genes are region of non coding dna which regulate the transcription of neighbouring genes. They regulate the gene expression by binding to the transcription factors. The most charaterised example of cis regulatory elements are promoters and enhancers. Operators are cis regulatory elements in prokaryotes and some eukaryotes that exist within operons. They can bind with repressors to affect transcription.
The regulatory gene LacI produces an mRNA that produces a lac repressor protein. This protein can bind to the operator of lac operon.
LacZ is encode for beta galactosidase which cleaves lactose into glucose and galactose. Lac Y encode for permease which increases permeability of cell for lactose. Lac A encode for transacetylase.
gladiator answered 2 years agoRelated Solutions
outline the operon theory, including the function cis-acting and trans -acting elements, using the lac operon...
outline the operon theory, including the function cis-acting and
trans -acting elements, using the lac operon as an example
Please emphasize if the following are cis-acting, trans-acting or both on the lac operon. The lac...
Please emphasize if the following are cis-acting,
trans-acting or both on the lac operon.
The lac repressor Protein:
The Operator sequence:
The Operon sequence:
RNA Polymerase II
Consider the lac operon in E. coli. a. List the cis-acting elements and the trans-acting factors...
Consider the lac operon in E. coli.
a. List the cis-acting elements and the trans-acting factors
involved in the regulation of its expression.
b. Indicate which Transacting factors interact with which
cis-elements.
c. Describe what the factors do when they are bound to their
respective cis–elements.
d. Indicate the inducer in this system and how it works.
How can cis- and trans- acting regulatory elements be distinguished?
How can cis- and trans- acting regulatory
elements be distinguished?
A cis-acting mutation that leads to MINIMAL expression of the lac operon would most likely be...
A cis-acting mutation that leads to MINIMAL expression of the
lac operon would most likely be in the CAP binding site. Is this
true or false, and why? Thanks!
The lac operon consists of several genes that encode enzymes required for metabolizing lactose. The expression...
The lac operon consists of several genes that encode enzymes
required for metabolizing lactose. The expression of the lac operon
is regulated by the presence of lactose and glucose.
Q) Describe the regulation operon when the level of glucose is
low and the level of lactose is high?
The lac operon consists of several genes that encode enzymes required for metabolizing lactose. The expression...
The lac operon consists of several genes that encode enzymes
required for metabolizing lactose. The expression of the lac operon
is regulated by the presence of lactose and glucose.
Q) What changes could you make to the lac operon to make the
transcription from it independent of the presence or absence of
lactose?
The lac operon consists of several genes that encode enzymes required for metabolizing lactose. The expression...
The lac operon consists of several genes that encode enzymes
required for metabolizing lactose. The expression of the lac operon
is regulated by the presence of lactose and glucose.
Q) describe the regulation operon when the level of glucose is
high and the level of lactose is high?
Which are characteristics of regulatory transcription factors? (select all that apply) a. Act at cis-acting elements...
Which are characteristics of regulatory transcription factors?
(select all that apply)
a. Act at cis-acting elements
b. Activity modulated by protein-protein interactions
c. Bind to promoter sequence
d. Activity sometimes modulated by small effector molecules
e. Regulate transcription of specific target genes
f. Can act to repress or activate transcription
g. Activity modulated by covalent modifications
h. Necessary for basal level of transcription
For each of the following, indicate if it is cis-acting or trans-acting A regulatory gene that...
For each of the following, indicate if it is cis-acting or
trans-acting
A regulatory gene that codes for a transcription factor
_______________
A promoter _______________
An operator _________________
An enhancer _________________
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