Question 1

Transcriptional activation of the lac operon requires both high lactose and low glucose conditions because:

Accepted Answer

A)  RNA polymerase requires CAP in order to bind to the lac operon promoter, even in the absence of the repressor. 
B)  glucose normally activates the lac operon repressor. 
C)  RNA polymerase is inactive in the presence of high glucose concentrations. 
D)  high glucose concentrations stimulate CAP activity. 
E)  glucose and lactose compete for binding to, and inactivation of, the lac operon repressor. 
A)  RNA polymerase requires CAP in order to bind to the lac operon promoter, even in the absence of the repressor. 
B)  glucose normally activates the lac operon repressor. 
C)  RNA polymerase is inactive in the presence of high glucose concentrations. 
D)  high glucose concentrations stimulate CAP activity. 
E)  glucose and lactose compete for binding to, and inactivation of, the lac operon repressor.

Question 2

In an inducible operon, the ____ is the molecular switch that controls gene expression, while the ____ is the DNA region where RNA polymerase binds to begin transcription.

Accepted Answer

A)  repressor; inducer 
B)  inducer; repressor 
C)  operator; promoter 
D)  promoter; operator 
E)  lactose; promoter 
A)  repressor; inducer 
B)  inducer; repressor 
C)  operator; promoter 
D)  promoter; operator 
E)  lactose; promoter

Question 3

An operon is defined as:

Accepted Answer

A)  a group of structural genes, with no regulatory sequences 
B)  regulatory sequences upstream of a structural gene 
C)  a group of related structural genes, plus their associated regulatory sequences 
D)  one structural gene plus one regulatory gene 
E)  a group of unrelated structural genes, plus their associated regulatory sequences 
A)  a group of structural genes, with no regulatory sequences 
B)  regulatory sequences upstream of a structural gene 
C)  a group of related structural genes, plus their associated regulatory sequences 
D)  one structural gene plus one regulatory gene 
E)  a group of unrelated structural genes, plus their associated regulatory sequences

Question 4

Outline the various methods of gene regulation in eukaryotic cells. Include chromatin, transcriptional, posttranscriptional, translational, and posttranslational levels of regulation.

Accepted Answer

Answers should resem

Question 5

Eukaryotic transcription factors:

Accepted Answer

A)  are known as CAPs 
B)  may be activators or repressors of transcription 
C)  are inducers 
D)  are corepressors 
E)  are also known as enhancers 
A)  are known as CAPs 
B)  may be activators or repressors of transcription 
C)  are inducers 
D)  are corepressors 
E)  are also known as enhancers

Question 6

Match between columns
                        Premises: proteases and proteosomes

Accepted Answer

The Answer of protein degradation and chemical modification and proteolytic is...

Exam 14: Gene Regulation

Transcriptional activation of the lac operon requires both high lactose and low glucose conditions because:

In an inducible operon, the ____ is the molecular switch that controls gene expression, while the ____ is the DNA region where RNA polymerase binds to begin transcription.

An operon is defined as:

Outline the various methods of gene regulation in eukaryotic cells. Include chromatin, transcriptional, posttranscriptional, translational, and posttranslational levels of regulation.

Eukaryotic transcription factors:

A View of Life

Atoms and Molecules: the Chemical Basis of Life

The Chemistry of Life: Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp: Energy-Releasing Pathways

Photosynthesis: Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

DNA: The Carrier of Genetic Information

Gene Expression

DNA Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity: Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure, Growth, and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function: an Introduction

Protection, Support, and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System: Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology: Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

Filters

In an inducible operon, the is the molecular switch that controls gene expression, while the is the DNA region where RNA polymerase binds to begin transcription.