Question 1

Your tongue does NOT grow hair because

Accepted Answer

A)  the genes for hair proteins have been deleted from the cells of your tongue. 
B)  different genes are expressed in different tissues. 
C)  saliva prevents hair from growing. 
D)  skin cells have extra DNA that codes for hair proteins. 
A)  the genes for hair proteins have been deleted from the cells of your tongue. 
B)  different genes are expressed in different tissues. 
C)  saliva prevents hair from growing. 
D)  skin cells have extra DNA that codes for hair proteins.

Question 2

Which of the following contains four types of nucleotides but no uracil?

Accepted Answer

A)  Ribosomal RNA 
B)  DNA 
C)  Messenger RNA 
D)  Transfer RNA 
E)  RNA polymerase 
A)  Ribosomal RNA 
B)  DNA 
C)  Messenger RNA 
D)  Transfer RNA 
E)  RNA polymerase

Question 3

Which of the following is NOT a means of regulating gene expression?

Accepted Answer

A)  Varying the rate at which messenger RNAs are transcribed 
B)  Modifying proteins after they are synthesized 
C)  Regulating how long a protein lasts in a cell 
D)  Varying the rate at which messenger RNAs are translated 
E)  Deleting genes from cells in which they are not needed 
A)  Varying the rate at which messenger RNAs are transcribed 
B)  Modifying proteins after they are synthesized 
C)  Regulating how long a protein lasts in a cell 
D)  Varying the rate at which messenger RNAs are translated 
E)  Deleting genes from cells in which they are not needed

Question 4

The manufacture of proteins from RNA and amino acids is referred to as

Accepted Answer

A)  transcription. 
B)  replication. 
C)  activation. 
D)  translation. 
E)  transformation. 
A)  transcription. 
B)  replication. 
C)  activation. 
D)  translation. 
E)  transformation.

Question 5

Which statement correctly describes transcription?

Accepted Answer

A)  RNA chains of all genes are synthesized from the same DNA strand, with the growing RNA strand always starting at the 3' end and moving toward the 5' end. 
B)  RNA chains of all genes are synthesized from the same DNA strand, with the growing RNA strand always starting at the 5' end and moving toward the 3' end. 
C)  RNA chains of different genes can be transcribed from either DNA strand, with RNA polymerase traveling from the 5' end and moving toward the 3' end. 
D)  RNA chains of different genes can be transcribed from either DNA strand, with RNA polymerase traveling from the 3' end and moving toward the 5' end. 
A)  RNA chains of all genes are synthesized from the same DNA strand, with the growing RNA strand always starting at the 3' end and moving toward the 5' end. 
B)  RNA chains of all genes are synthesized from the same DNA strand, with the growing RNA strand always starting at the 5' end and moving toward the 3' end. 
C)  RNA chains of different genes can be transcribed from either DNA strand, with RNA polymerase traveling from the 5' end and moving toward the 3' end. 
D)  RNA chains of different genes can be transcribed from either DNA strand, with RNA polymerase traveling from the 3' end and moving toward the 5' end.

Question 6

What kind of mutation occurs when one base is changed to another at a single location in the DNA?

Accepted Answer

A)  Neutral 
B)  Substitution 
C)  Insertion 
D)  Deletion 
A)  Neutral 
B)  Substitution 
C)  Insertion 
D)  Deletion

Question 7

Describe the three basic steps or processes involved in transcription.

Accepted Answer

First, initiation involves RNA polymeras

Question 8

How can RNA be distinguished from DNA?

Accepted Answer

A)  RNA is never found in the nucleus. 
B)  RNA does not contain a sugar. 
C)  RNA is single- stranded. 
D)  RNA lacks the base uracil. 
A)  RNA is never found in the nucleus. 
B)  RNA does not contain a sugar. 
C)  RNA is single- stranded. 
D)  RNA lacks the base uracil.

Question 9

Determine the sequence of bases in mRNA if the original DNA base sequence is TAGGCTAA.

Accepted Answer

The answer of Determine the sequence of bases in mRNA...

Question 10

For a mutation to affect the evolution of an animal species, it must occur within

Accepted Answer

A)  prokaryotic cells. 
B)  diploid cells. 
C)  gametes. 
D)  somatic cells. 
A)  prokaryotic cells. 
B)  diploid cells. 
C)  gametes. 
D)  somatic cells.

Question 11

tRNA is necessary for transcription to occur.

Accepted Answer

A) True 
 B)False

Question 12

The process of copying genetic information from DNA to RNA is called

Accepted Answer

A)  transcription. 
B)  transformation. 
C)  replication. 
D)  translation. 
A)  transcription. 
B)  transformation. 
C)  replication. 
D)  translation.

Question 13

Which of the following has two polynucleotide strands?

Accepted Answer

A)  Ribosomal RNA 
B)  DNA 
C)  Messenger RNA 
D)  Transfer RNA 
E)  RNA polymerase 
A)  Ribosomal RNA 
B)  DNA 
C)  Messenger RNA 
D)  Transfer RNA 
E)  RNA polymerase

Question 14

As seen in this figure, how many exons were used to assemble the pre- mRNA sequence, and how many exons were used in the finished mRNA?

Accepted Answer

A)  3; 2 
B)  3; 3 
C)  5; 3 
D)  6; 3 
A)  3; 2 
B)  3; 3 
C)  5; 3 
D)  6; 3

Question 15

Which of the following is a protein made up of amino acids?

Accepted Answer

A)  Transfer RNA 
B)  Messenger RNA 
C)  DNA 
D)  Uracil 
E)  RNA polymerase 
A)  Transfer RNA 
B)  Messenger RNA 
C)  DNA 
D)  Uracil 
E)  RNA polymerase

Question 16

The genetic material of some viruses, such as HIV, is not DNA but is instead

Accepted Answer

A)  carbohydrate. 
B)  RNA. 
C)  lipid. 
D)  protein. 
A)  carbohydrate. 
B)  RNA. 
C)  lipid. 
D)  protein.

Question 17

How many bases are in a codon?

Accepted Answer

A)  4 
B)  3 
C)  20 
D)  64 
A)  4 
B)  3 
C)  20 
D)  64

Question 18

A mutation in which one nucleotide in the DNA sequence is substituted for another nucleotide is referred to as a mutation.

Accepted Answer

The answer of A mutation in which one nucleotide in...

Question 19

What molecule is responsible for translation of the four- letter "nucleic acid language" (A, T, G, and C nucleotides) into the 20 "amino acid language" of proteins by bringing in amino acids to the ribosome?

Accepted Answer

A)  Messenger RNA 
B)  Transfer RNA 
C)  DNA 
D)  Ribosomal RNA 
A)  Messenger RNA 
B)  Transfer RNA 
C)  DNA 
D)  Ribosomal RNA

Question 20

A gene can be mutated with no resulting functional change in the protein that is produced from that gene if

Accepted Answer

A)  a codon has changed, but it codes for the same amino acid as the original codon. 
B)  RNA polymerase can edit the mutation from the mRNA produced during translation. 
C)  the mutation alters the active site of an enzyme. 
D)  an entire codon has been removed. 
A)  a codon has changed, but it codes for the same amino acid as the original codon. 
B)  RNA polymerase can edit the mutation from the mRNA produced during translation. 
C)  the mutation alters the active site of an enzyme. 
D)  an entire codon has been removed.

Exam 13: Gene Expression and Regulation

Your tongue does NOT grow hair because

Which of the following contains four types of nucleotides but no uracil?

Which of the following is NOT a means of regulating gene expression?

The manufacture of proteins from RNA and amino acids is referred to as

Which statement correctly describes transcription?

What kind of mutation occurs when one base is changed to another at a single location in the DNA?

Describe the three basic steps or processes involved in transcription.

How can RNA be distinguished from DNA?

Determine the sequence of bases in mRNA if the original DNA base sequence is TAGGCTAA.

For a mutation to affect the evolution of an animal species, it must occur within

tRNA is necessary for transcription to occur.

The process of copying genetic information from DNA to RNA is called

Which of the following has two polynucleotide strands?

As seen in this figure, how many exons were used to assemble the pre- mRNA sequence, and how many exons were used in the finished mRNA?

Which of the following is a protein made up of amino acids?

The genetic material of some viruses, such as HIV, is not DNA but is instead

How many bases are in a codon?

A mutation in which one nucleotide in the DNA sequence is substituted for another nucleotide is referred to as a mutation.

What molecule is responsible for translation of the four- letter "nucleic acid language" (A, T, G, and C nucleotides) into the 20 "amino acid language" of proteins by bringing in amino acids to the ribosome?

A gene can be mutated with no resulting functional change in the protein that is produced from that gene if

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

Cellular Reproduction

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

Dna: the Molecule of Heredity

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity II: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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