Question 1

During replication,each "old" DNA strand serves as a template for a new strand.

Accepted Answer

A) True 
 B)False

Question 2

DNA ________ results in the copying of a DNA molecule.

Accepted Answer

The answer of DNA ________ results in the copying of...

Question 3

Borrelia burgdorferi has a genome of 0.5 million base pairs and little noncoding DNA.Borrelia burgdorferi is a ________.

Accepted Answer

The answer of Borrelia burgdorferi has a genome of 0.5...

Question 4

Mismatch errors are

Accepted Answer

A)  almost always corrected by mutagens. 
B)  almost always corrected by DNA repair proteins. 
C)  usually caused by transposons. 
D)  usually caused by mutated proteins. 
A)  almost always corrected by mutagens. 
B)  almost always corrected by DNA repair proteins. 
C)  usually caused by transposons. 
D)  usually caused by mutated proteins.

Question 5

Assume a cell present in your body has performed a mismatch error during the process of DNA replication.This error has resulted in the generation of a new allele for one of your genes.For this new allele to be inherited by your offspring,which of the following conditions must be true?

Accepted Answer

A)  The error must be repaired. 
B)  The error must be caused by a chemical mutagen. 
C)  The error must occur in the germ line cells. 
D)  The new allele produced must be dominant. 
A)  The error must be repaired. 
B)  The error must be caused by a chemical mutagen. 
C)  The error must occur in the germ line cells. 
D)  The new allele produced must be dominant.

Question 6

The following figure illustrates DNA undergoing replication.The region indicated by the arrow in this image represents a

Accepted Answer

A)  single base pair. 
B)  mismatch error. 
C)  deletion. 
D)  transformation. 
A)  single base pair. 
B)  mismatch error. 
C)  deletion. 
D)  transformation.

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 a...

Question 8

The following table shows which of these four genes are on or off in three different cell types.
 
Why is the expression of the rRNA gene so different from the expression of the other genes in the table?

Accepted Answer

A)  rRNA is required for the proper functioning of all cells,but the products of the other genes are only essential to the function of one cell type. 
B)  rRNA is easier to produce than the products of the other genes. 
C)  The rRNA gene is found in the genomes of all three cell types,but the other genes are only found in the genomes of their specific cell type. 
D)  rRNA is needed at all stages of the cell cycle,but the products of the other genes are only needed during cell division. 
A)  rRNA is required for the proper functioning of all cells,but the products of the other genes are only essential to the function of one cell type. 
B)  rRNA is easier to produce than the products of the other genes. 
C)  The rRNA gene is found in the genomes of all three cell types,but the other genes are only found in the genomes of their specific cell type. 
D)  rRNA is needed at all stages of the cell cycle,but the products of the other genes are only needed during cell division.

Question 9

All cells in an organism contain a full copy of that organism's DNA.Your ears do NOT produce digestive enzymes because

Accepted Answer

A)  stomach cells have extra DNA. 
B)  ear cells have nonfunctional DNA. 
C)  some DNA is deleted from cells where it is not needed. 
D)  different genes are expressed in different parts of an organism. 
A)  stomach cells have extra DNA. 
B)  ear cells have nonfunctional DNA. 
C)  some DNA is deleted from cells where it is not needed. 
D)  different genes are expressed in different parts of an organism.

Question 10

The order of the base pairs in a DNA molecule

Accepted Answer

A)  differs from species to species. 
B)  is identical in all organisms. 
C)  is identical in organisms of the same species. 
D)  differs from cell to cell in a given organism. 
A)  differs from species to species. 
B)  is identical in all organisms. 
C)  is identical in organisms of the same species. 
D)  differs from cell to cell in a given organism.

Question 11

Once replication in a DNA molecule is complete,each new DNA molecule contains one old strand and one new strand.This type of replication is called

Accepted Answer

A)  transcriptive. 
B)  semiconservative. 
C)  covalent. 
D)  corruptive. 
A)  transcriptive. 
B)  semiconservative. 
C)  covalent. 
D)  corruptive.

Question 12

To repair DNA,a protein cuts out the damaged section.

Accepted Answer

A) True 
 B)False

Question 13

The two strands of a DNA molecule are held together by ________ bonds between their base pairs.

Accepted Answer

A)  hydrogen 
B)  amino acid 
C)  phosphate 
D)  protein 
A)  hydrogen 
B)  amino acid 
C)  phosphate 
D)  protein

Question 14

During DNA replication,the template strands of the original DNA molecule are complementary both to each other and to one of the new strands.

Accepted Answer

A) True 
 B)False

Question 15

To start DNA replication,the bonds holding the strands together are broken,and the molecule begins to unwind.Which of the following statements best summarizes what happens next?

Accepted Answer

A)  New strands are synthesized and paired with each other. 
B)  Each old strand acts as a template for a new strand. 
C)  Each old strand is broken down into nucleotides. 
D)  Transformation results in a new DNA molecule. 
A)  New strands are synthesized and paired with each other. 
B)  Each old strand acts as a template for a new strand. 
C)  Each old strand is broken down into nucleotides. 
D)  Transformation results in a new DNA molecule.

Question 16

Is a species that lacks DNA repair mechanisms likely to have more or fewer variations between individuals than a species that possesses repair mechanisms?

Accepted Answer

A)  Fewer,because there are fewer ways to change the DNA. 
B)  Fewer,because the repair mechanisms introduce more variation into the DNA sequence. 
C)  More,because more spontaneous mutations will go uncorrected. 
D)  More,because without a repair mechanism,the cell's tumor suppressor genes are inactivated. 
A)  Fewer,because there are fewer ways to change the DNA. 
B)  Fewer,because the repair mechanisms introduce more variation into the DNA sequence. 
C)  More,because more spontaneous mutations will go uncorrected. 
D)  More,because without a repair mechanism,the cell's tumor suppressor genes are inactivated.

Question 17

A change in an organism's environment generally results in a change in ________,leading to the production of different types of proteins.

Accepted Answer

The answer of A change in an organism's environment generally...

Question 18

Along one side of a DNA molecule,the nucleotides are connected to each other by

Accepted Answer

A)  covalent bonds between phosphate groups and sugar molecules. 
B)  hydrogen bonds between adenine and guanine. 
C)  covalent bonds between bases and sugar molecules. 
D)  hydrogen bonds between adjacent sugar molecules. 
A)  covalent bonds between phosphate groups and sugar molecules. 
B)  hydrogen bonds between adenine and guanine. 
C)  covalent bonds between bases and sugar molecules. 
D)  hydrogen bonds between adjacent sugar molecules.

Question 19

Enzymes proofread base pairing during DNA replication.

Accepted Answer

A) True 
 B)False

Question 20

Benzopyrene is a compound found in cigarettes that binds to the base guanine in DNA.This distorts the DNA double helix and causes changes in DNA sequence.Based on this information,benzopyrene is a

Accepted Answer

A)  DNA repair protein. 
B)  histone. 
C)  transposon. 
D)  mutagen. 
A)  DNA repair protein. 
B)  histone. 
C)  transposon. 
D)  mutagen.

Exam 11: DNA and Genes

During replication,each "old" DNA strand serves as a template for a new strand.

DNA ________ results in the copying of a DNA molecule.

Borrelia burgdorferi has a genome of 0.5 million base pairs and little noncoding DNA.Borrelia burgdorferi is a ________.

Mismatch errors are

Assume a cell present in your body has performed a mismatch error during the process of DNA replication.This error has resulted in the generation of a new allele for one of your genes.For this new allele to be inherited by your offspring,which of the following conditions must be true?

The following figure illustrates DNA undergoing replication.The region indicated by the arrow in this image represents a

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

The following table shows which of these four genes are on or off in three different cell types. Why is the expression of the rRNA gene so different from the expression of the other genes in the table?

All cells in an organism contain a full copy of that organism's DNA.Your ears do NOT produce digestive enzymes because

The order of the base pairs in a DNA molecule

Once replication in a DNA molecule is complete,each new DNA molecule contains one old strand and one new strand.This type of replication is called

To repair DNA,a protein cuts out the damaged section.

The two strands of a DNA molecule are held together by ________ bonds between their base pairs.

During DNA replication,the template strands of the original DNA molecule are complementary both to each other and to one of the new strands.

To start DNA replication,the bonds holding the strands together are broken,and the molecule begins to unwind.Which of the following statements best summarizes what happens next?

Is a species that lacks DNA repair mechanisms likely to have more or fewer variations between individuals than a species that possesses repair mechanisms?

A change in an organism's environment generally results in a change in ________,leading to the production of different types of proteins.

Along one side of a DNA molecule,the nucleotides are connected to each other by

Enzymes proofread base pairing during DNA replication.

Benzopyrene is a compound found in cigarettes that binds to the base guanine in DNA.This distorts the DNA double helix and causes changes in DNA sequence.Based on this information,benzopyrene is a

The Nature of Science and the Characteristics of Life

The Chemistry of Life

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy, Metabolism, and Enzymes

Photosynthesis and Cellular Respiration

Cell Division

Cancer and Human Health

Patterns of Inheritance

Chromosomes and Human Genetics

From Gene to Protein

DNA Technology

How Evolution Works

The Origin of Species

The Evolution of Biodiversity

Biological Diversity, Bacteria, and Archaea

Protista, Plantae, and Fungi

Animalia

The Biosphere

Growth of Populations

Animal Behavior

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

The Immune System

Reproduction and Development

Plant Structure, Nutrition, and Transport

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