Question 1

Bacterial gene regulation occurs mainly at the __________ level.

Accepted Answer

A)  translational 
B)  transcriptional 
C)  posttranscriptional 
D)  feedback inhibition 
E)  posttranslational 
A)  translational 
B)  transcriptional 
C)  posttranscriptional 
D)  feedback inhibition 
E)  posttranslational

Question 2

Feedback inhibition of the first enzyme of a pathway by the end product of the pathway is an example of:

Accepted Answer

A)  translational control. 
B)  posttranslational control. 
C)  transcriptional control. 
D)  inhibiting control. 
E)  repression. 
A)  translational control. 
B)  posttranslational control. 
C)  transcriptional control. 
D)  inhibiting control. 
E)  repression.

Question 3

MATCHING
Match the type of gene regulation with the process.
a.regulation of transcription
d.regulation of translation
b.regulation of mRNA processing
e.regulation of chromatin
c.regulation of mRNA transport
-Promotor and enhancer elements in DNA

Accepted Answer

The answer of MATCHING
Match the type of gene regulation with...

Question 4

Densely staining regions of highly compacted chromatin that are generally not transcribed are:

Accepted Answer

A)  heterochromatin. 
B)  homochromatin. 
C)  histone-dependent chromatin. 
D)  primary chromatin. 
E)  heterochromatinization 
A)  heterochromatin. 
B)  homochromatin. 
C)  histone-dependent chromatin. 
D)  primary chromatin. 
E)  heterochromatinization

Question 5

The inducer of the lactose operon in E.coli is:

Accepted Answer

A)  CAP. 
B)  AMP. 
C)  allolactose. 
D)  glucose. 
E)  galactose. 
A)  CAP. 
B)  AMP. 
C)  allolactose. 
D)  glucose. 
E)  galactose.

Question 6

A TATA box is seen in __________ cells and is the site where __________.

Accepted Answer

A)  bacterial; RNA polymerase binds 
B)  eukaryotic; DNA ligase cleaves introns 
C)  eukaryotic; RNA polymerase binds 
D)  both bacterial and eukaryotic; transcription factors bind 
E)  bacterial; a repressor protein binds 
A)  bacterial; RNA polymerase binds 
B)  eukaryotic; DNA ligase cleaves introns 
C)  eukaryotic; RNA polymerase binds 
D)  both bacterial and eukaryotic; transcription factors bind 
E)  bacterial; a repressor protein binds

Question 7

Enzymes that alter another protein or enzyme's activity by attaching a phosphate group are called:

Accepted Answer

A)  kinases. 
B)  phosphatases. 
C)  phospators. 
D)  transcription factors. 
E)  coenzymes. 
A)  kinases. 
B)  phosphatases. 
C)  phospators. 
D)  transcription factors. 
E)  coenzymes.

Question 8

Proteolytic processing of eukaryotic proteins involves:

Accepted Answer

A)  removal of a portion of the polypeptide chain from an inactive precursor of the protein. 
B)  the addition of one or more functional groups to a precursor protein. 
C)  the removal of one or more functional groups from a precursor protein. 
D)  removal of histones. 
E)  removing the cap and tail of a newly synthesized protein. 
A)  removal of a portion of the polypeptide chain from an inactive precursor of the protein. 
B)  the addition of one or more functional groups to a precursor protein. 
C)  the removal of one or more functional groups from a precursor protein. 
D)  removal of histones. 
E)  removing the cap and tail of a newly synthesized protein.

Question 9

cAMP levels decrease when __________.This results in __________ of CAP.

Accepted Answer

A)  lactose levels increase; activation 
B)  lactose levels decrease; inhibition 
C)  glucose levels increase; inhibition 
D)  glucose levels decrease; activation 
E)  glucose levels decrease; inhibition 
A)  lactose levels increase; activation 
B)  lactose levels decrease; inhibition 
C)  glucose levels increase; inhibition 
D)  glucose levels decrease; activation 
E)  glucose levels decrease; inhibition

Question 10

Constitutive genes code for proteins that are needed for survival .
__________________

Accepted Answer

A) True 
 B)False

Question 11

Inducible genes are usually actively transcribed when:

Accepted Answer

A)  the molecule degraded by the enzyme(s) is present in the cell. 
B)  repressor molecules bind to the promoter. 
C)  lactose is absent from the cell. 
D)  quantities of precursor materials are low. 
E)  there is no other substrate that can be used by the cell. 
A)  the molecule degraded by the enzyme(s) is present in the cell. 
B)  repressor molecules bind to the promoter. 
C)  lactose is absent from the cell. 
D)  quantities of precursor materials are low. 
E)  there is no other substrate that can be used by the cell.

Question 12

Figure 14-1
Use the figure to answer the corresponding question(s).  
-The scenario in the accompanying figure reflects conditions of:

Accepted Answer

A)  low levels of lactose. 
B)  high levels of lactose. 
C)  low levels of glucose. 
D)  high levels of glucose. 
E)  high levels of arabinose 
A)  low levels of lactose. 
B)  high levels of lactose. 
C)  low levels of glucose. 
D)  high levels of glucose. 
E)  high levels of arabinose

Question 13

A repressor protein would have which of the following effects on repressible genes with a negative control mechanism?

Accepted Answer

A)  stimulate transcription in the presence of a corepressor 
B)  turn off transcription in the presence of an inducer 
C)  stimulate transcription in the presence of a coactivator 
D)  turn off transcription in the presence of a corepressor 
E)  no response 
A)  stimulate transcription in the presence of a corepressor 
B)  turn off transcription in the presence of an inducer 
C)  stimulate transcription in the presence of a coactivator 
D)  turn off transcription in the presence of a corepressor 
E)  no response

Question 14

Figure 14-1
Use the figure to answer the corresponding question(s).  
-The promoter in Figure 14-1 is labeled __________.

Accepted Answer

A)  6 
B)  3 
C)  1 
D)  2 
E)  7 
A)  6 
B)  3 
C)  1 
D)  2 
E)  7

Question 15

Eukaryotes have inducible genes that respond to environmental stimuli.
__________________

Accepted Answer

A) True 
 B)False

Question 16

Identify two ways in which posttranscriptional gene regulation occurs in eukaryotes and briefly explain each.

Accepted Answer

The addition of a poly- A- tai

Question 17

In the lac operon, cAMP binds to:

Accepted Answer

A)  DNA. 
B)  the repressor gene. 
C)  the operator gene. 
D)  the repressor protein. 
E)  catabolite activator protein. 
A)  DNA. 
B)  the repressor gene. 
C)  the operator gene. 
D)  the repressor protein. 
E)  catabolite activator protein.

Exam 14: Gene Regulation

Bacterial gene regulation occurs mainly at the __________ level.

Feedback inhibition of the first enzyme of a pathway by the end product of the pathway is an example of:

MATCHING Match the type of gene regulation with the process. a.regulation of transcription d.regulation of translation b.regulation of mRNA processing e.regulation of chromatin c.regulation of mRNA transport -Promotor and enhancer elements in DNA

Densely staining regions of highly compacted chromatin that are generally not transcribed are:

The inducer of the lactose operon in E.coli is:

A TATA box is seen in __________ cells and is the site where __________.

Enzymes that alter another protein or enzyme's activity by attaching a phosphate group are called:

Proteolytic processing of eukaryotic proteins involves:

cAMP levels decrease when __________.This results in __________ of CAP.

Constitutive genes code for proteins that are needed for survival . __________________

Inducible genes are usually actively transcribed when:

Figure 14-1 Use the figure to answer the corresponding question(s). -The scenario in the accompanying figure reflects conditions of:

A repressor protein would have which of the following effects on repressible genes with a negative control mechanism?

Figure 14-1 Use the figure to answer the corresponding question(s). -The promoter in Figure 14-1 is labeled __________.

Eukaryotes have inducible genes that respond to environmental stimuli. __________________

Identify two ways in which posttranscriptional gene regulation occurs in eukaryotes and briefly explain each.

In the lac operon, cAMP binds to:

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

A TATA box is seen in cells and is the site where .

cAMP levels decrease when .This results in of CAP.