Question 1

In knockout experiments,_______________.

Accepted Answer

A)  genes are added to chromosomes 
B)  normal genes are replaced physically by mutated genes 
C)  genes are mutated or deleted to prevent their expression 
D)  mRNAs are prevented from attaching to ribosomes 
E)  the protein products of specific genes are inactivated

Question 2

What is the most efficient way to regulate gene expression from the perspective of cellular resources?

Accepted Answer

The answer of What is the most efficient way to...

Question 3

X inactivation in calico cat fur results in ________________.

Accepted Answer

A)  formation of secondary male characteristics 
B)  mosaic hair color in females 
C)  mosaic hair color in males 
D)  hairless phenotype 
E)  all-white hair color

Question 4

Choose the one most appropriate answer for each.
-Transport control

Accepted Answer

A) Influences the amount and kinds of mRNA assembled from structural gene 
B) Splicing, capping, and adding a poly-A tail 
C) Nuclear envelope selectively regulates passage of transcripts 
D) Phosphorylation of translated protein 
E) Dosage compensation

Question 5

Differentiation is the process in which cells _____________.

Accepted Answer

A)  mature into larger cells 
B)  change from one type of muscle to another 
C)  change to repair injuries 
D)  turn on all the genomic genes 
E)  express different subsets of their genes during development

Question 6

X chromosome inactivation results in the _______________________.

Accepted Answer

A)  total inactivation of both X chromosomes 
B)  inactivation of only the paternal X chromosome 
C)  inactivation of only the maternal X chromosome 
D)  inactivation of either the paternal X chromosome or the maternal X chromosome 
E)  nonrandom inactivation of X chromosomes in the initial cells of tissues

Question 7

The promotion of the lac operon in bacteria is ________________________.

Accepted Answer

A)  activated by a repressor protein 
B)  dependent on lactose concentration 
C)  dependent on glucose concentration 
D)  regulated by RNA polymerase 
E)  regulated by mRNA

Question 8

A mammalian female's ___________________________.

Accepted Answer

A)  cells usually have multiple Barr bodies 
B)  body is a mosaic for the X-linked traits she inherits 
C)  Barr bodies are active in some cells 
D)  Barr bodies are produced after puberty 
E)  X-linked recessive genes are always expressed because of the deactivation of an X chromosome in each cell

Question 9

Choose the one most appropriate answer for each.
-Barr body

Accepted Answer

A) A condensed X chromosome 
B) Protein that combines with DNA all along its length 
C) Attaches or detaches from operator to regulate transcription 
D) Portion of the operon that binds RNA polymerase 
E) Genes that induce expression of other genes
F)Genes controlling the development of specific body parts
G)Mechanism of equalizing gene expression between the sexes
H)Binding sites on DNA for regulatory proteins that increase transcription rates

Question 10

Homeotic genes generally control _________________.

Accepted Answer

A)  X chromosome inactivation 
B)  the formation of a specific body part 
C)  hormone synthesis. 
D)  dosage compensation 
E)  DNA methylation.

Question 11

Adding acetyl and methyl groups to a histone regulates gene expression by _________________.

Accepted Answer

A)  increasing the pH of the cell 
B)  loosening the DNA wound around the histone 
C)  modifying the nucleotides of the promoter region of the DNA molecule 
D)  tightening the DNA wound around the histone 
E)  enhancing the development of a DNA-RNA hybrid

Question 12

As cell lineages use varying subsets of genes during development,they become specialized through a process called __________.

Accepted Answer

The answer of As cell lineages use varying subsets of...

Question 13

Classification. Choose the proper item below for the following statements.
-Repressors,activators,and transcription factors

Accepted Answer

A) Operon 
B) Operator 
C) Promoter 
D) Repressor protein 
E) Regulator protein

Question 14

Which statement about promoters is true?

Accepted Answer

A)  They are long sequences in DNA. 
B)  They are locations in DNA where regulatory proteins do not gather. 
C)  They control transcription. 
D)  They are associated with all genes. 
E)  They slow the rate of transcription.

Question 15

In the ABC model of flower development in Arabidopsis thaliana,sepals form when which gene(s)is/are switched on?

Accepted Answer

A)  A only 
B)  A and B 
C)  B and C 
D)  C only 
E)  A and B and C

Question 16

The following compounds are produced by plants during the day and broken down at night,except _____________.

Accepted Answer

A)  rubisco 
B)  photosystem II 
C)  ATP synthase 
D)  photosynthetic proteins 
E)  carbon dioxide

Question 17

Classification. Choose the proper item below for the following statements.
-When the repressor is inactivated,RNA polymerase can bind here and allow transcription to occur

Accepted Answer

A) Operon 
B) Operator 
C) Promoter 
D) Repressor protein 
E) Regulator protein

Question 18

Choose the one most appropriate answer for each.
-mRNA processing

Accepted Answer

A) Influences the amount and kinds of mRNA assembled from structural gene 
B) Splicing, capping, and adding a poly-A tail 
C) Nuclear envelope selectively regulates passage of transcripts 
D) Phosphorylation of translated protein 
E) Dosage compensation

Question 19

Choose the one most appropriate answer for each.
-Promoter

Accepted Answer

A) A condensed X chromosome 
B) Protein that combines with DNA all along its length 
C) Attaches or detaches from operator to regulate transcription 
D) Portion of the operon that binds RNA polymerase 
E) Genes that induce expression of other genes
F)Genes controlling the development of specific body parts
G)Mechanism of equalizing gene expression between the sexes
H)Binding sites on DNA for regulatory proteins that increase transcription rates

Question 20

Choose the one most appropriate answer for each.
-Enhancers

Accepted Answer

A) A condensed X chromosome 
B) Protein that combines with DNA all along its length 
C) Attaches or detaches from operator to regulate transcription 
D) Portion of the operon that binds RNA polymerase 
E) Genes that induce expression of other genes
F)Genes controlling the development of specific body parts
G)Mechanism of equalizing gene expression between the sexes
H)Binding sites on DNA for regulatory proteins that increase transcription rates

Exam 10: Control of Gene Expression

In knockout experiments,_______________.

What is the most efficient way to regulate gene expression from the perspective of cellular resources?

X inactivation in calico cat fur results in ________________.

Choose the one most appropriate answer for each. -Transport control

Differentiation is the process in which cells _____________.

X chromosome inactivation results in the _______________________.

The promotion of the lac operon in bacteria is ________________________.

A mammalian female's ___________________________.

Choose the one most appropriate answer for each. -Barr body

Homeotic genes generally control _________________.

Adding acetyl and methyl groups to a histone regulates gene expression by _________________.

As cell lineages use varying subsets of genes during development,they become specialized through a process called __________.

Classification. Choose the proper item below for the following statements. -Repressors,activators,and transcription factors

Which statement about promoters is true?

In the ABC model of flower development in Arabidopsis thaliana,sepals form when which gene(s) is/are switched on?

The following compounds are produced by plants during the day and broken down at night,except _____________.

Classification. Choose the proper item below for the following statements. -When the repressor is inactivated,RNA polymerase can bind here and allow transcription to occur

Choose the one most appropriate answer for each. -mRNA processing

Choose the one most appropriate answer for each. -Promoter

Choose the one most appropriate answer for each. -Enhancers