Question 1

One method eukaryotes use to control gene expression is to break down a gene's protein product.

Accepted Answer

A) True 
 B)False

Question 2

DNA consists of two twisted strands of ____________________.

Accepted Answer

The answer of DNA consists of two twisted strands of...

Question 3

Once a gene has been translated, no further regulation of gene expression is possible.

Accepted Answer

A) True 
 B)False

Question 4

In condensed chromosomes, histone proteins

Accepted Answer

A) lie between introns in the DNA molecule. 
B) contain most of the spacer genes in a cell. 
C) have DNA wrapped around them. 
D) are sites where active transcription takes place. 
A) lie between introns in the DNA molecule. 
B) contain most of the spacer genes in a cell. 
C) have DNA wrapped around them. 
D) are sites where active transcription takes place.

Question 5

An operator is a sequence of DNA whose function it is to

Accepted Answer

A) bind to the chromosome to prevent replication. 
B) bind to the chromosome to prevent gene expression. 
C) control the transcription of a gene or group of genes. 
D) control the translation of a gene or group of genes. 
A) bind to the chromosome to prevent replication. 
B) bind to the chromosome to prevent gene expression. 
C) control the transcription of a gene or group of genes. 
D) control the translation of a gene or group of genes.

Question 6

The significance of specific base pairing in DNA is that

Accepted Answer

A) it stabilizes the sugar molecule. 
B) it provides a method for making exact copies of DNA. 
C) it prevents errors in DNA replication. 
D) protein copies can be made directly from the DNA. 
A) it stabilizes the sugar molecule. 
B) it provides a method for making exact copies of DNA. 
C) it prevents errors in DNA replication. 
D) protein copies can be made directly from the DNA.

Question 7

During DNA replication, the enzyme ____________________ builds a new strand of DNA while using the old strand of DNA as a template.

Accepted Answer

The answer of During DNA replication, the enzyme ____________________ builds...

Question 8

How can a cell contain DNA molecules that are much longer than the cell?

Accepted Answer

A) The cell expands to fit the DNA inside. 
B) DNA not used by that cell is deleted. 
C) DNA is very narrow and tightly packed. 
D) RNA copies allow DNA to dissolve. 
A) The cell expands to fit the DNA inside. 
B) DNA not used by that cell is deleted. 
C) DNA is very narrow and tightly packed. 
D) RNA copies allow DNA to dissolve.

Question 9

Mismatch errors are

Accepted Answer

A) almost always corrected by mutagens. 
B) also called mutations. 
C) almost always corrected by specialized proteins. 
D) usually caused by mutated proteins. 
A) almost always corrected by mutagens. 
B) also called mutations. 
C) almost always corrected by specialized proteins. 
D) usually caused by mutated proteins.

Question 10

A permanent change in the DNA base sequence due to an uncorrected mismatch error is called a ____________________.

Accepted Answer

The answer of A permanent change in the DNA base...

Question 11

Translation builds DNA from an RNA template.

Accepted Answer

A) True 
 B)False

Question 12

Exposure to phthalates during development appears to result in a ____ in the amount of Sonic Hedgehog protein produced in the cells of an embryo.

Accepted Answer

The answer of Exposure to phthalates during development appears to...

Question 13

A(n)____________________ error occurs when the wrong base is inserted during DNA replication.

Accepted Answer

The answer of A(n)____________________ error occurs when the wrong base...

Question 14

DNA is tightly packed around protein spools known as ____________________.

Accepted Answer

The answer of DNA is tightly packed around protein spools...

Question 15

A cell has a repressor protein for the group of genes that makes substance A. If substance A is present in sufficient quantities,

Accepted Answer

A) the repressor protein will be bound to RNA polymerase. 
B) the repressor protein will be bound to the promoter. 
C) substance A will be bound to the operator. 
D) a repressor protein-substance A complex will be bound to the operator. 
A) the repressor protein will be bound to RNA polymerase. 
B) the repressor protein will be bound to the promoter. 
C) substance A will be bound to the operator. 
D) a repressor protein-substance A complex will be bound to the operator.

Question 16

If one strand of DNA has the sequence CGATT, the sequence of the other strand of the same molecule will be

Accepted Answer

A) CGATT. 
B) GCTUU. 
C) TACGG. 
D) GCTAA. 
A) CGATT. 
B) GCTUU. 
C) TACGG. 
D) GCTAA.

Question 17

The figure below illustrates two levels of DNA packing in a eukaryotic cell. Conformation B is an enlargement of the area in Conformation A, indicated by the start of the arrow. In which conformation is transcription most likely to occur?

Accepted Answer

A) Conformation A, because the tight coiling brings regulatory DNA sequences closer together. 
B) Conformation A, because tight coiling only occurs during cell division, which is when transcription occurs. 
C) Conformation B, because RNA polymerase can only access regulatory DNA when chromosomes are not condensed. 
D) Conformation B, because in this conformation, the DNA is completely separated from histones that bind to regulatory DNA sequences preventing transcription. 
A) Conformation A, because the tight coiling brings regulatory DNA sequences closer together. 
B) Conformation A, because tight coiling only occurs during cell division, which is when transcription occurs. 
C) Conformation B, because RNA polymerase can only access regulatory DNA when chromosomes are not condensed. 
D) Conformation B, because in this conformation, the DNA is completely separated from histones that bind to regulatory DNA sequences preventing transcription.

Question 18

The benefit of putting a group of related genes under the control of a single ____________________ is that the activation of this single regulatory sequence can lead to the production of all the proteins needed to respond to an environmental change.

Accepted Answer

The answer of The benefit of putting a group of...

Question 19

People with xeroderma pigmentosum frequently exhibit skin cancer. The disease is a result of a mutation in a gene that produces a ____________________ protein. Without this protein, cells cannot fix changes in their DNA sequence caused by exposure to ultraviolet (UV)light.

Accepted Answer

The answer of People with xeroderma pigmentosum frequently exhibit skin...

Question 20

DNA is ____________________ [more or less] tightly packaged during interphase when most gene expression occurs.

Accepted Answer

The answer of DNA is ____________________ [more or less] tightly...

Exam 14: Dna and Genes

One method eukaryotes use to control gene expression is to break down a gene's protein product.

DNA consists of two twisted strands of ____________________.

Once a gene has been translated, no further regulation of gene expression is possible.

In condensed chromosomes, histone proteins

An operator is a sequence of DNA whose function it is to

The significance of specific base pairing in DNA is that

During DNA replication, the enzyme ____________________ builds a new strand of DNA while using the old strand of DNA as a template.

How can a cell contain DNA molecules that are much longer than the cell?

Mismatch errors are

A permanent change in the DNA base sequence due to an uncorrected mismatch error is called a ____________________.

Translation builds DNA from an RNA template.

Exposure to phthalates during development appears to result in a ____ in the amount of Sonic Hedgehog protein produced in the cells of an embryo.

A(n)____________________ error occurs when the wrong base is inserted during DNA replication.

DNA is tightly packed around protein spools known as ____________________.

A cell has a repressor protein for the group of genes that makes substance A. If substance A is present in sufficient quantities,

If one strand of DNA has the sequence CGATT, the sequence of the other strand of the same molecule will be

The figure below illustrates two levels of DNA packing in a eukaryotic cell. Conformation B is an enlargement of the area in Conformation A, indicated by the start of the arrow. In which conformation is transcription most likely to occur?

The benefit of putting a group of related genes under the control of a single ____________________ is that the activation of this single regulatory sequence can lead to the production of all the proteins needed to respond to an environmental change.

People with xeroderma pigmentosum frequently exhibit skin cancer. The disease is a result of a mutation in a gene that produces a ____________________ protein. Without this protein, cells cannot fix changes in their DNA sequence caused by exposure to ultraviolet (UV)light.

DNA is ____________________ [more or less] tightly packaged during interphase when most gene expression occurs.

The Nature of Science and the Characteristics of Life

Biological Diversity, Bacteria, and Archaea

Protista, Plantae, and Fungi

Animalia

The Chemistry of Life

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy, Metabolism, and Enzymes

Photosynthesis and Cellular Respiration

Cell Division

Stem Cells, Cancer, and Human Health

Patterns of Inheritance

Chromosomes and Human Genetics

From Gene to Protein

Dna Technology

How Evolution Works

Evolution of Populations

Speciation and the Origins of Biological Diversity

The Evolutionary History of Life

The Biosphere

Growth of Populations

Ecological Communities

Ecosystems

Global Change

Internal Organization and Homeostasis

Nutrition and Digestion

Circulation and Gas Exchange

Animal Hormones

Nervous and Sensory Systems

Skeletons, Muscles, and Movement

Defenses Against Disease

Reproduction and Development

Animal Behavior

Plant Structure, Nutrition, and Transport

Plant Growth and Reproduction

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