Question 1

Unlike prokaryotes,most gene regulation in eukaryotes

Accepted Answer

A) takes place at the transcriptional level. 
B) is controlled at the level of transcript processing. 
C) is controlled by inhibitory proteins. 
D) is based on posttranslational modification. 
E) None of these 
A) takes place at the transcriptional level. 
B) is controlled at the level of transcript processing. 
C) is controlled by inhibitory proteins. 
D) is based on posttranslational modification. 
E) None of these

Question 2

Steriod hormones are effector molecules.

Accepted Answer

A) True 
 B)False

Question 3

Plants produce steroids called phytosterols,which have various functions in plant physiology.Some phytosterols are thought to have a defensive function,however,specifically in repelling insect herbivores.How might plant-derived steroids help protect plants from insect attack?

Accepted Answer

In some cases,the plant-derived steroids

Question 4

What would happen developmentally if a zygote with XY sex chromosome karyotype had a defective testosterone receptor?

Accepted Answer

We learned in this chapter tha

Question 5

Several common protein structural motifs are now known to be involved in DNA recognition and binding.What are these,and how would researchers use genomic data to help figure out if new candidate genes encode such DNA-binding proteins?

Accepted Answer

DNA-binding structural motifs of protein

Question 6

Imprinting is implicated in Prader-Willi and Angelman syndromes.

Accepted Answer

A) True 
 B)False

Question 7

Embryonic development is orchestrated by a cascading series of genes,the expression of many of which are controlled in time and space by transcription factors and effector molecules of various kinds.But what controls the expression of the first regulatory genes to be transcribed in the newly fertilized zygote?

Accepted Answer

The egg contains stored mRNAs

Question 8

Control of transcription initiation of eukaryotic protein-coding genes involves

Accepted Answer

A) enhancers. 
B) promoters. 
C) repressors. 
D) activators. 
E) All of these 
A) enhancers. 
B) promoters. 
C) repressors. 
D) activators. 
E) All of these

Question 9

longer poly(A)tails on mRNAs are associated with less translational activity.

Accepted Answer

A) True 
 B)False

Question 10

Hormones can be considered

Accepted Answer

A) inducers. 
B) repressors. 
C) transcription regulators. 
D) translation regulators. 
E) enzymes. 
A) inducers. 
B) repressors. 
C) transcription regulators. 
D) translation regulators. 
E) enzymes.

Question 11

With respect to genetics,URS stands for

Accepted Answer

A) uracil response system. 
B) upstream regulatory sequence. 
C) upstream repressor-binding sequence. 
D) unregulated repression series. 
E) uniform response system. 
A) uracil response system. 
B) upstream regulatory sequence. 
C) upstream repressor-binding sequence. 
D) unregulated repression series. 
E) uniform response system.

Question 12

Proteins that are encoded by the same gene but differ in structure and function are the product of alternative splicing in pre-mRNA processing.Such protein variants are termed

Accepted Answer

A) isoteins. 
B) heteromeric proteins. 
C) isozymes. 
D) protein isoforms. 
E) allelomorphs. 
A) isoteins. 
B) heteromeric proteins. 
C) isozymes. 
D) protein isoforms. 
E) allelomorphs.

Question 13

What are some advantages and disadvantages of arranging gene clusters into operons?

Accepted Answer

Operons can be advantageous in that regu

Question 14

Explain how combinatorial gene regulation permits regulation of a large diversity of genes with relatively few regulatory proteins.

Accepted Answer

Although the number of differe

Question 15

Insect growth and metamorphosis is controlled by the steroid hormones ecdysone and juvenile hormone (JH).In insects like butterflies and moths that have a distinct larval (juvenile)and adult stage,the relative amount of JH determines whether the insect molts to the next juvenile stage or switches to become an adult.Can you think of a way to use this hormonal system to control caterpillar agricultural pests?

Accepted Answer

The best approach would be to somehow su

Question 16

Steroid and peptide hormone receptors are typically cytoplasmic.

Accepted Answer

A) True 
 B)False

Question 17

mRNA regulation can be achieved at the level of

Accepted Answer

A) transport. 
B) processing. 
C) translation. 
D) life span (degradation). 
E) All of these 
A) transport. 
B) processing. 
C) translation. 
D) life span (degradation). 
E) All of these

Question 18

Describe how siRNA functions in regulation of expression and how this can be used as a tool in genetic research.

Accepted Answer

"Small interfering" RNA can complex with

Question 19

Gene silencing is a form of regulation controlled by repressor proteins.

Accepted Answer

A) True 
 B)False

Question 20

HREs are

Accepted Answer

A) hormone receptors. 
B) DNA sequences in promoter regions to which steroid hormone receptors bind. 
C) proteins that interact with histones. 
D) elements that lead to histone deacetylation. 
E) None of these 
A) hormone receptors. 
B) DNA sequences in promoter regions to which steroid hormone receptors bind. 
C) proteins that interact with histones. 
D) elements that lead to histone deacetylation. 
E) None of these

Exam 18: Regulation of Gene Expression in Eukaryotes

Unlike prokaryotes,most gene regulation in eukaryotes

Steriod hormones are effector molecules.

Plants produce steroids called phytosterols,which have various functions in plant physiology.Some phytosterols are thought to have a defensive function,however,specifically in repelling insect herbivores.How might plant-derived steroids help protect plants from insect attack?

What would happen developmentally if a zygote with XY sex chromosome karyotype had a defective testosterone receptor?

Several common protein structural motifs are now known to be involved in DNA recognition and binding.What are these,and how would researchers use genomic data to help figure out if new candidate genes encode such DNA-binding proteins?

Imprinting is implicated in Prader-Willi and Angelman syndromes.

Control of transcription initiation of eukaryotic protein-coding genes involves

longer poly(A)tails on mRNAs are associated with less translational activity.

Hormones can be considered

With respect to genetics,URS stands for

Proteins that are encoded by the same gene but differ in structure and function are the product of alternative splicing in pre-mRNA processing.Such protein variants are termed

What are some advantages and disadvantages of arranging gene clusters into operons?

Explain how combinatorial gene regulation permits regulation of a large diversity of genes with relatively few regulatory proteins.

Steroid and peptide hormone receptors are typically cytoplasmic.

mRNA regulation can be achieved at the level of

Describe how siRNA functions in regulation of expression and how this can be used as a tool in genetic research.

Gene silencing is a form of regulation controlled by repressor proteins.

HREs are

Genetics: An Introduction

DNA: The Genetic Material

DNA Replication

Gene Function

Gene Expression: Transcription

Gene Expression: Translation

Dna Mutation, DNA Repair, and Transposable Elements

Genomics: The Mapping and Sequencing of Genomes

Functional and Comparative Genomics

Recombinant DNA Technology

Mendelian Genetics

Chromosomal Basis of Inheritance

Extensions of and Deviations From Mendelian Genetic Principles

Genetic Mapping in Eukaryotes

Genetics of Bacteria and Bacteriophages

Variations in Chromosome Structure and Number

Regulation of Gene Expression in Bacteria and Bacteriophages

Genetic Analysis of Development

Genetics of Cancer

Population Genetics

Quantitative Genetics

Molecular Evolution

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