Twitter - Quiz Tutors
Nucleosomes disaggregate to allow transcription and then reaggregate
Facebook - Quiz Tutors

Nucleosomes Disaggregate – Chemistry Hw

The key terms of Chemistry Homework include, Nucleosomes Disaggregate.


Nucleosomes disaggregate to allow transcription and then reaggregate

by acetylation and deacetylation


a cell that contains three Barr bodies will necessarily have

four X chromosomes


Catabolite repression refers to the

shutdown of transcription from many operons when glucose is present in the medium


which of the following is a chromosomal mutation?

inversion


in a semiconservative replication of dna,

the strands of the double helix separate and act as templates for new strands.


A bacterial gene regulatory system is likely to have all of the following except

introns


Which of the following mechanisms of posttranscriptional regulation of gene expression can produce several different proteins from a single gene?

alternative splicing


Suppose that a certain enzyme is synthesized whenever the solution in which the cells are growing lacks substance X. When substance X is present, the enzyme is produced only under certain environmental conditions. This phenomenon would most likely be an example of _______ gene regulation.

Repressible


heterochromatin

contains poly a tails


the TATA box is a(n)

sequence close to the promoter region of many genes


the barr body is evidence for

x-chromosome inactivation


How are inducible and repressible systems similar

In both systems the regulatory molecules function by binding to the operator


The mechanism by which the inducer causes the repressor to detach from the operator is an example of

allosteric regulation


An inducer…Select one:


a. binds to the termination codons and allows protein synthesis to continue.
b. combines with a repressor and prevents it from binding the promoter.
c. combines with a repressor and prevents it from binding the operator.- correct
d. binds to the promoter and prevents the repressor from binding to the operator.e. binds to the operator and prevents the repressor from binding at this site.


RNA polymerase by itself cannot bind to the chromosome and initiate transcription. It can bind and act only after regulatory proteins called _______ factors have been assembled.

transcription


Transcription factors are

proteins that bind to the DNA promoter sequence


A promoter is the region of

DNA that binds RNA polymerase


Which molecule is used to mark or label proteins for destruction?

Ubiquitin


Imagine that the TATA box for gene X becomes highly methylated. How will this affect the expression of gene X?

Gene X will not be transcribed or translated.


You are studying the effects of specific transcription factors on the activation of gene expression. You notice that one particular transcription factor binds far away from the promoter of its target gene. What can explain this?

DNA looping brings the transcription factor closer to the promoter and initiates gene transcription.


Nucleosomes disaggregate to allow transcription and then reaggregate

by acetylation and deacetylation


a cell that contains three Barr bodies will necessarily have

four X chromosomes


Catabolite repression refers to the

shutdown of transcription from many operons when glucose is present in the medium


which of the following is a chromosomal mutation?

inversion


in a semiconservative replication of dna,

the strands of the double helix separate and act as templates for new strands.


A bacterial gene regulatory system is likely to have all of the following except

introns


Which of the following mechanisms of posttranscriptional regulation of gene expression can produce several different proteins from a single gene?

alternative splicing


Suppose that a certain enzyme is synthesized whenever the solution in which the cells are growing lacks substance X. When substance X is present, the enzyme is produced only under certain environmental conditions. This phenomenon would most likely be an example of _______ gene regulation.

Repressible


heterochromatin

contains poly a tails


the TATA box is a(n)

sequence close to the promoter region of many genes


the barr body is evidence for

x-chromosome inactivation


How are inducible and repressible systems similar

In both systems the regulatory molecules function by binding to the operator


The mechanism by which the inducer causes the repressor to detach from the operator is an example of

allosteric regulation


An inducer…Select one:


a. binds to the termination codons and allows protein synthesis to continue.
b. combines with a repressor and prevents it from binding the promoter.
c. combines with a repressor and prevents it from binding the operator.- correct
d. binds to the promoter and prevents the repressor from binding to the operator.e. binds to the operator and prevents the repressor from binding at this site.


RNA polymerase by itself cannot bind to the chromosome and initiate transcription. It can bind and act only after regulatory proteins called _______ factors have been assembled.

transcription


Transcription factors are

proteins that bind to the DNA promoter sequence


A promoter is the region of

DNA that binds RNA polymerase


Which molecule is used to mark or label proteins for destruction?

Ubiquitin


Imagine that the TATA box for gene X becomes highly methylated. How will this affect the expression of gene X?

Gene X will not be transcribed or translated.


You are studying the effects of specific transcription factors on the activation of gene expression. You notice that one particular transcription factor binds far away from the promoter of its target gene. What can explain this?

DNA looping brings the transcription factor closer to the promoter and initiates gene transcription.


Homepage