Question 1

The default state for the lac operon is "off" while the default state for the trp operon is "on". Explain this difference in regulation and the mechanism of control via the repressor proteins. ​

Accepted Answer

The lac operon's function is to allow a ...

Question 2

Gene regulation in both prokaryotes and eukaryotes ____. ​

Accepted Answer

A)  involves significant chromatin remodeling
B)  requires transcription and translation to occur in separate cellular compartments
C)  produces differentiated cells
D)  involves transcriptional control
E)  involves alternative splicing

Question 3

Explain the difference between benign and malignant tumors. ​

Accepted Answer

In benign tumors, the cells have dediffe...

Question 4

Transcription factors that control genes for developmental events are encoded by ____ genes. ​

Accepted Answer

A)  Hox
B)  homeotic
C)  master regulator
D)  activator
E)  maternal effect

Question 5

Match between columns
                        Premises: proximal promoter region

Accepted Answer

The Answer of  d and  f and  is...

Question 6

Compare the functions of maternal effect genes, segmentation genes, and homeotic genes in Drosophila . ​

Accepted Answer

Maternal effect genes are expressed in t...

Question 7

How does RNA polymerase II bind to the DNA? ​

Accepted Answer

A)  It binds directly to the eukaryotic promoter sequence.
B)  It binds directly to the TATA box.
C)  It binds to transcription factors in the nucleus, and the complex then binds to the promoter.
D)  Transcription factors first bind to the promoter, then recruit RNA polymerase II.
E)  Some transcription factors bind to the promoter while others bind to RNA polymerase II, then the two groups of proteins bind to each other.

Question 8

If an operon is regulated by ____ control, genes are ____ by a regulatory protein called a ____. ​

Accepted Answer

A)  positive; on unless they are switched off; repressor
B)  negative; off unless they are switched on; repressor
C)  negative; on unless they are switched off; repressor
D)  positive; off unless they are switched on; repressor
E)  positive; on unless they are switched off; activator

Question 9

The trp operon is an example of a(n) ____ operon where tryptophan acts as a(n) ____. ​

Accepted Answer

A)  inducible; inducer
B)  inducible; activator
C)  repressible; corepressor
D)  repressible; repressor
E)  repressible; inducer

Question 10

Compare DNA methylation to histone acetylation.

Accepted Answer

DNA methylation and histone acetylation ...

Question 11

In prokaryotes, the genes for metabolic pathways are ____. ​

Accepted Answer

A)  always expressed for early steps in the pathway, but generally not expressed for later steps in the pathway
B)  always expressed so the bacteria can respond to rapidly to changing conditions
C)  turned on and off as conditions change
D)  always independently regulated
E)  generally expressed at low levels, but expressed at high levels when conditions warrant

Question 12

Match between columns
                        Premises: coactivator multiprotein complex

Accepted Answer

The Answer of  e and  c and  is...

Question 13

Match between columns
                        Premises: enhancer

Accepted Answer

The Answer of  a and  e and  is...

Question 14

Changes in pre-mRNA processing and the rate at which mRNAs are degraded are a part of ____. ​

Accepted Answer

A)  histone modifications
B)  chromatin remodeling
C)  transcriptional regulation
D)  posttranscriptional regulation
E)  genomic imprinting

Question 15

Match between columns
                        Premises: Lac repressor

Accepted Answer

The Answer of  g and  f and  is...

Question 16

In eukaryotes, ____ regulation is the first level at which gene expression is controlled. ​

Accepted Answer

A)  transcriptional
B)  translational
C)  posttranscriptional
D)  posttranslational
E)  replicative

Question 17

Genes expressed in almost all cell types are called ____ genes. ​

Accepted Answer

A)  housekeeping
B)  regulated
C)  activator
D)  homeotic
E)  structural

Question 18

When histones are rearranged to control gene access, it is called ____. ​

Accepted Answer

A)  transcription
B)  chromatin remodeling
C)  DNA condensation
D)  remodeling complex formation
E)  acetylation

Question 19

The genes in an operon are ____. ​

Accepted Answer

A)  each transcribed into individual mRNAs
B)  transcribed into a single mRNA transcript
C)  controlled by separate promoters
D)  transcribed as a single mRNA in prokaryotes, but as individual mRNAs in eukaryotes
E)  located at different chromosomal loci

Question 20

Why is ubiquitin nicknamed the "doom tag"? ​

Accepted Answer

A)  When ubiquitin binds to a target protein, the ubiquitin enzyme degrades the protein.
B)  When ubiquitin binds to a target protein, the complex is sent to the proteasome and degraded.
C)  If a cell is deficient in ubiquitin, the cell will die.
D)  High levels of ubiquitin in a cell cause the cell to destroy vital proteins, leading to premature cell death.
E)  Ubiquitin binds to ribosomes and prevents them from translating proteins necessary for cell survival.

Exam 16: Regulation of Gene Expression

If an operon is regulated by control, genes are by a regulatory protein called a .

Correct Answer
verified

How does RNA polymerase II bind to the DNA?

Correct Answer
verified

Labeling Identify each labeled part of the following illustration of eukaryotic DNA. Figure 16.1

Changes in pre-mRNA processing and the rate at which mRNAs are degraded are a part of ____.

Correct Answer
verified

Labeling Identify each labeled part in the following illustration of the lac operon. Figure 16.2

The default state for the lac operon is "off" while the default state for the trp operon is "on". Explain this difference in regulation and the mechanism of control via the repressor proteins.

Correct Answer
verified
The lac operon's function is to allow a ...
View Answer

The trp operon is an example of a(n) operon where tryptophan acts as a(n) .

Correct Answer
verified

Genes expressed in almost all cell types are called ____ genes.

Correct Answer
verified

Gene regulation in both prokaryotes and eukaryotes ____.

Correct Answer
verified

Labeling Identify each labeled part of the following illustration of eukaryotic DNA. Figure 16.1

In prokaryotes, the genes for metabolic pathways are ____.

Correct Answer
verified

Transcription factors that control genes for developmental events are encoded by ____ genes.

Correct Answer
verified

Compare DNA methylation to histone acetylation.

Correct Answer
verified
DNA methylation and histone acetylation ...
View Answer

Explain the difference between benign and malignant tumors.

Correct Answer
verified
In benign tumors, the cells have dediffe...
View Answer

Labeling Identify each labeled part of the following illustration of eukaryotic DNA. Figure 16.1

Compare the functions of maternal effect genes, segmentation genes, and homeotic genes in Drosophila .

Correct Answer
verified
Maternal effect genes are expressed in t...
View Answer

Why is ubiquitin nicknamed the "doom tag"?

Correct Answer
verified

When histones are rearranged to control gene access, it is called ____.

Correct Answer
verified

In eukaryotes, ____ regulation is the first level at which gene expression is controlled.

Correct Answer
verified

The genes in an operon are ____.

Correct Answer
verified

Exam 16: Regulation of Gene Expression

If an operon is regulated by ____ control, genes are ____ by a regulatory protein called a ____. ​

Correct AnswerverifiedShow Answer

How does RNA polymerase II bind to the DNA? ​

Correct AnswerverifiedShow Answer

Labeling Identify each labeled part of the following illustration of eukaryotic DNA. Figure 16.1

Changes in pre-mRNA processing and the rate at which mRNAs are degraded are a part of ____. ​

Correct AnswerverifiedShow Answer

Labeling Identify each labeled part in the following illustration of the lac operon. Figure 16.2

The default state for the lac operon is "off" while the default state for the trp operon is "on". Explain this difference in regulation and the mechanism of control via the repressor proteins. ​

Correct AnswerverifiedThe lac operon's function is to allow a ...View AnswerShow Answer

The trp operon is an example of a(n) ____ operon where tryptophan acts as a(n) ____. ​

Correct AnswerverifiedShow Answer

Genes expressed in almost all cell types are called ____ genes. ​

Correct AnswerverifiedShow Answer

Gene regulation in both prokaryotes and eukaryotes ____. ​

Correct AnswerverifiedShow Answer

Labeling Identify each labeled part of the following illustration of eukaryotic DNA. Figure 16.1

In prokaryotes, the genes for metabolic pathways are ____. ​

Correct AnswerverifiedShow Answer

Transcription factors that control genes for developmental events are encoded by ____ genes. ​

Correct AnswerverifiedShow Answer

Compare DNA methylation to histone acetylation.

Correct AnswerverifiedDNA methylation and histone acetylation ...View AnswerShow Answer

Explain the difference between benign and malignant tumors. ​

Correct AnswerverifiedIn benign tumors, the cells have dediffe...View AnswerShow Answer

Labeling Identify each labeled part of the following illustration of eukaryotic DNA. Figure 16.1

Compare the functions of maternal effect genes, segmentation genes, and homeotic genes in Drosophila . ​

Correct AnswerverifiedMaternal effect genes are expressed in t...View AnswerShow Answer

Why is ubiquitin nicknamed the "doom tag"? ​

Correct AnswerverifiedShow Answer

When histones are rearranged to control gene access, it is called ____. ​

Correct AnswerverifiedShow Answer

In eukaryotes, ____ regulation is the first level at which gene expression is controlled. ​

Correct AnswerverifiedShow Answer

The genes in an operon are ____. ​

Correct AnswerverifiedShow Answer

If an operon is regulated by control, genes are by a regulatory protein called a .

Correct Answer
verified

How does RNA polymerase II bind to the DNA?

Correct Answer
verified

Changes in pre-mRNA processing and the rate at which mRNAs are degraded are a part of ____.

Correct Answer
verified

The default state for the lac operon is "off" while the default state for the trp operon is "on". Explain this difference in regulation and the mechanism of control via the repressor proteins.

Correct Answer
verified
The lac operon's function is to allow a ...
View Answer

The trp operon is an example of a(n) operon where tryptophan acts as a(n) .

Correct Answer
verified

Genes expressed in almost all cell types are called ____ genes.

Correct Answer
verified

Gene regulation in both prokaryotes and eukaryotes ____.

Correct Answer
verified

In prokaryotes, the genes for metabolic pathways are ____.

Correct Answer
verified

Transcription factors that control genes for developmental events are encoded by ____ genes.

Correct Answer
verified

Correct Answer
verified
DNA methylation and histone acetylation ...
View Answer

Explain the difference between benign and malignant tumors.

Correct Answer
verified
In benign tumors, the cells have dediffe...
View Answer

Compare the functions of maternal effect genes, segmentation genes, and homeotic genes in Drosophila .

Correct Answer
verified
Maternal effect genes are expressed in t...
View Answer

Why is ubiquitin nicknamed the "doom tag"?

Correct Answer
verified

When histones are rearranged to control gene access, it is called ____.

Correct Answer
verified

In eukaryotes, ____ regulation is the first level at which gene expression is controlled.

Correct Answer
verified

The genes in an operon are ____.

Correct Answer
verified