Question 1

Use the following to answer questions:
Refer to the diagram below.  
-From the diagram it can be concluded that

Accepted Answer

A)  each transcription factor has specific binding sites. 
B)  transcription factors bind directly to DNA. 
C)  TFIID binds to the promoter at the TATA box after B and F have altered its shape. 
D)  protein-coding genes contain noncoding sequences. 
E)  RNA polymerase II binds to the promoter and initiates transcription. 
A)  each transcription factor has specific binding sites. 
B)  transcription factors bind directly to DNA. 
C)  TFIID binds to the promoter at the TATA box after B and F have altered its shape. 
D)  protein-coding genes contain noncoding sequences. 
E)  RNA polymerase II binds to the promoter and initiates transcription.

Question 2

There are several proteins involved in transcription, including transcription factors, regulatory binding proteins, and activators. Their role is to tell RNA polymerase

Accepted Answer

A)  where to start transcribing the DNA. 
B)  which genes to transcribe. 
C)  where to stop transcribing the DNA. 
D)  Both a and b 
E)  a, b, and c 
A)  where to start transcribing the DNA. 
B)  which genes to transcribe. 
C)  where to stop transcribing the DNA. 
D)  Both a and b 
E)  a, b, and c

Question 3

DNA is wound around histones to form structures that block both the initiation and elongation steps of transcription. These structures are

Accepted Answer

A)  condensed chromosomes. 
B)  lampbrush chromosomes. 
C)  nucleosomes. 
D)  the solenoid structure of DNA. 
E)  30 nm DNA fibers. 
A)  condensed chromosomes. 
B)  lampbrush chromosomes. 
C)  nucleosomes. 
D)  the solenoid structure of DNA. 
E)  30 nm DNA fibers.

Question 4

The genetic information of viruses can be

Accepted Answer

A)  DNA. 
B)  RNA. 
C)  single-stranded. 
D)  double-stranded. 
E)  All of the above 
A)  DNA. 
B)  RNA. 
C)  single-stranded. 
D)  double-stranded. 
E)  All of the above

Question 5

Regulation of gene expression during the phage lytic cycle does not include

Accepted Answer

A)  binding of a host RNA polymerase to a viral promoter. 
B)  stimulation of viral late gene transcription. 
C)  enhancement of the host's gene transcription. 
D)  enhancement of viral early gene transcription. 
E)  down regulation of the host's gene transcription. 
A)  binding of a host RNA polymerase to a viral promoter. 
B)  stimulation of viral late gene transcription. 
C)  enhancement of the host's gene transcription. 
D)  enhancement of viral early gene transcription. 
E)  down regulation of the host's gene transcription.

Question 6

One of the genes that is known to be transcribed from the inactive X chromosome is

Accepted Answer

A)  Xist. 
B)  ZIST. 
C)  inactivation controller protein. 
D)  lithozist. 
E)  methyl-X. 
A)  Xist. 
B)  ZIST. 
C)  inactivation controller protein. 
D)  lithozist. 
E)  methyl-X.

Question 7

Which of the following is not a control mechanism for regulating the amount of protein synthesized in eukaryotic cells?

Accepted Answer

A)  Transcription regulation 
B)  Inhibit translation with miRNAs 
C)  Transcript processing 
D)  Breakdown of the synthesized protein 
E)  Stabilization of the mRNA 
A)  Transcription regulation 
B)  Inhibit translation with miRNAs 
C)  Transcript processing 
D)  Breakdown of the synthesized protein 
E)  Stabilization of the mRNA

Question 8

The different members of the $\beta$-globin gene family

Accepted Answer

A)  are expressed differently in different tissues. 
B)  are expressed differently at different times of development. 
C)  are expressed in the same way in different tissues. 
D)  are expressed in the same way at different times of development. 
E)  have no known function. 
A)  are expressed differently in different tissues. 
B)  are expressed differently at different times of development. 
C)  are expressed in the same way in different tissues. 
D)  are expressed in the same way at different times of development. 
E)  have no known function.

Question 9

The CRP-cAMP complex binds _______ of the operon.

Accepted Answer

A)  close to the RNA polymerase binding site 
B)  close to the operator 
C)  inside one of the structural genes 
D)  at the termination point 
E)  None of the above 
A)  close to the RNA polymerase binding site 
B)  close to the operator 
C)  inside one of the structural genes 
D)  at the termination point 
E)  None of the above

Question 10

Which operon is turned "off" in response to molecules present in the environment of the cell?

Accepted Answer

A)  Repressible 
B)  Suppressible 
C)  Impressible 
D)  Inducible 
E)  Degraded 
A)  Repressible 
B)  Suppressible 
C)  Impressible 
D)  Inducible 
E)  Degraded

Question 11

The Barr body is evidence for

Accepted Answer

A)  X chromosome inactivation. 
B)  cell death. 
C)  ion pumps. 
D)  posttranslational control of eukaryotic gene expression. 
E)  None of the above 
A)  X chromosome inactivation. 
B)  cell death. 
C)  ion pumps. 
D)  posttranslational control of eukaryotic gene expression. 
E)  None of the above

Question 12

Viruses

Accepted Answer

A)  arise from preexisting viruses. 
B)  replicate their DNA before they reproduce. 
C)  develop and reproduce only within the cells of hosts. 
D)  cannot replicate. 
E)  None of the above 
A)  arise from preexisting viruses. 
B)  replicate their DNA before they reproduce. 
C)  develop and reproduce only within the cells of hosts. 
D)  cannot replicate. 
E)  None of the above

Question 13

Which of the following is not a DNA binding motif?

Accepted Answer

A)  Helix-straight-helix 
B)  Helix-turn-helix 
C)  Helix-loop-helix 
D)  Leucine zipper 
E)  Zinc finger 
A)  Helix-straight-helix 
B)  Helix-turn-helix 
C)  Helix-loop-helix 
D)  Leucine zipper 
E)  Zinc finger

Question 14

In the initiation of the transcription of structural genes in eukaryotes, _______ cannot bind directly to the _______. Initiation requires _______ and other regulatory proteins called "_______."

Accepted Answer

A)  RNA polymerase I; initiation site; TFIID; transcription factors 
B)  RNA polymerase II; initiation site; TFIID; transcription factors 
C)  RNA polymerase III; initiation site; TFIID; initiation factors 
D)  RNA polymerase I; TATA box: initiation factors; TFIID 
E)  TFIID; RNA polymerase I; initiation site; transcription factors 
A)  RNA polymerase I; initiation site; TFIID; transcription factors 
B)  RNA polymerase II; initiation site; TFIID; transcription factors 
C)  RNA polymerase III; initiation site; TFIID; initiation factors 
D)  RNA polymerase I; TATA box: initiation factors; TFIID 
E)  TFIID; RNA polymerase I; initiation site; transcription factors

Question 15

Nucleosomes disaggregate to allow transcription and then reaggregate

Accepted Answer

A)  through alternative splicing. 
B)  by acetylation and deacetylation. 
C)  through alternation of nucleotides. 
D)  by attaching ubiquitin. 
E)  through insertion of nucleotides. 
A)  through alternative splicing. 
B)  by acetylation and deacetylation. 
C)  through alternation of nucleotides. 
D)  by attaching ubiquitin. 
E)  through insertion of nucleotides.

Question 16

The operon containing the genes for the three lactose-metabolizing proteins of E. coli is called the _______ operon.

Accepted Answer

The answer of The operon containing the genes for the...

Question 17

Which of the following is a transcription factor?

Accepted Answer

A)  A regulatory protein 
B)  RNA 
C)  DNA 
D)  Carbohydrate 
E)  Enzyme 
A)  A regulatory protein 
B)  RNA 
C)  DNA 
D)  Carbohydrate 
E)  Enzyme

Question 18

Animal viruses are termed obligate parasites. What is the meaning of this term?

Accepted Answer

Animal viruses cannot express their gene

Question 19

The interphase cells of normal female mammals have a stainable nuclear body called a Barr body. This body is

Accepted Answer

A)  an inactive X chromosome. 
B)  made of fat droplets. 
C)  made of fragments of mRNA. 
D)  made of extra chromosomal pieces. 
E)  None of the above 
A)  an inactive X chromosome. 
B)  made of fat droplets. 
C)  made of fragments of mRNA. 
D)  made of extra chromosomal pieces. 
E)  None of the above

Question 20

Operons

Accepted Answer

A)  are common in eukaryotes. 
B)  consist of structural genes only. 
C)  consist of a promoter, an operator, and two (or more) structural genes. 
D)  consist of a promoter, an operator, structural genes, and a repressor gene. 
E)  include inducer genes. 
A)  are common in eukaryotes. 
B)  consist of structural genes only. 
C)  consist of a promoter, an operator, and two (or more) structural genes. 
D)  consist of a promoter, an operator, structural genes, and a repressor gene. 
E)  include inducer genes.

Exam 16: Regulation of Gene Expression

Use the following to answer questions: Refer to the diagram below. -From the diagram it can be concluded that

There are several proteins involved in transcription, including transcription factors, regulatory binding proteins, and activators. Their role is to tell RNA polymerase

DNA is wound around histones to form structures that block both the initiation and elongation steps of transcription. These structures are

The genetic information of viruses can be

Regulation of gene expression during the phage lytic cycle does not include

One of the genes that is known to be transcribed from the inactive X chromosome is

Which of the following is not a control mechanism for regulating the amount of protein synthesized in eukaryotic cells?

The different members of the β\betaβ -globin gene family

The CRP-cAMP complex binds _______ of the operon.

Which operon is turned "off" in response to molecules present in the environment of the cell?

The Barr body is evidence for

Viruses

Which of the following is not a DNA binding motif?

In the initiation of the transcription of structural genes in eukaryotes, _______ cannot bind directly to the _______. Initiation requires _______ and other regulatory proteins called "_______."

Nucleosomes disaggregate to allow transcription and then reaggregate

The operon containing the genes for the three lactose-metabolizing proteins of E. coli is called the _______ operon.

Which of the following is a transcription factor?

Animal viruses are termed obligate parasites. What is the meaning of this term?

The interphase cells of normal female mammals have a stainable nuclear body called a Barr body. This body is

Operons

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The different members of the $\beta$ -globin gene family

In the initiation of the transcription of structural genes in eukaryotes, ___ cannot bind directly to the _. Initiation requires _ and other regulatory proteins called "___."