Question 1

A random change in the DNA nucleotide base sequence is called a .

Accepted Answer

mutation

Question 2

In the intestinal bacteria Escherichia coli, the DNA segment that contains the coding for the enzymes of lactose metabolism is called the lactose .

Accepted Answer

operon

Question 3

How can a single gene code for more than one protein?

Accepted Answer

A)  Different amino acid chains can be coded by the same mRNA. 
B)  Different RNA polymerases transcribe it and produce different proteins. 
C)  Different types of ribosomes translate the resulting mRNA, producing different proteins. 
D)  The exons within an mRNA can be spliced together in different ways. 
A)  Different amino acid chains can be coded by the same mRNA. 
B)  Different RNA polymerases transcribe it and produce different proteins. 
C)  Different types of ribosomes translate the resulting mRNA, producing different proteins. 
D)  The exons within an mRNA can be spliced together in different ways. D

Question 4

The fact that calico cats are only female supports the theory of

Accepted Answer

A)  testosterone inactivation of Y- chromosome genes. 
B)  two X chromosomes being required for coat color in cats. 
C)  mutations in all genes on one X chromosome. 
D)  X- chromosome inactivation and Barr bodies in females. 
A)  testosterone inactivation of Y- chromosome genes. 
B)  two X chromosomes being required for coat color in cats. 
C)  mutations in all genes on one X chromosome. 
D)  X- chromosome inactivation and Barr bodies in females.

Question 5

Messenger RNA is single- stranded.

Accepted Answer

A) True 
 B)False

Question 6

A "mini- gene" has the base sequence TACCCGTGCACG. Which of the following sequences represents a single base substitution?

Accepted Answer

A)  TACCCGTGCACG 
B)  TACCGTGCTACG 
C)  TACCCGAGCACG 
D)  TACCCGTGTCACG 
E)  TACCCGGCACG 
A)  TACCCGTGCACG 
B)  TACCGTGCTACG 
C)  TACCCGAGCACG 
D)  TACCCGTGTCACG 
E)  TACCCGGCACG

Question 7

If the sequence of bases in a section of DNA is TAGGCTAA, what is the corresponding sequence of bases in mRNA?

Accepted Answer

A)  ATCCGATT 
B)  AUCCGAUU 
C)  AATCGGAT 
D)  TAGGCTAA 
E)  CGAAUCGG 
A)  ATCCGATT 
B)  AUCCGAUU 
C)  AATCGGAT 
D)  TAGGCTAA 
E)  CGAAUCGG

Question 8

Which of the following is noted when comparing DNA and RNA?

Accepted Answer

A)  No sugar is present in either molecule. 
B)  Only DNA has a backbone made up of sugars and phosphates. 
C)  Hydrogen bonding is important only in DNA. 
D)  Adenine pairs with different bases in DNA and RNA. 
E)  Thymine pairs with different bases in DNA and RNA. 
A)  No sugar is present in either molecule. 
B)  Only DNA has a backbone made up of sugars and phosphates. 
C)  Hydrogen bonding is important only in DNA. 
D)  Adenine pairs with different bases in DNA and RNA. 
E)  Thymine pairs with different bases in DNA and RNA.

Question 9

Which of the following synthesizes RNA molecules in the nucleus?

Accepted Answer

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

Question 10

In eukaryotes, a promoter that signals the beginning of the gene and binds with the promoter typically consists of

Accepted Answer

A)  both DNA and RNA. 
B)  the base sequence AUG and transcription factor binding sites. 
C)  the bases TATAAA and response elements. 
D)  rRNA and tRNA. 
A)  both DNA and RNA. 
B)  the base sequence AUG and transcription factor binding sites. 
C)  the bases TATAAA and response elements. 
D)  rRNA and tRNA.

Question 11

A tRNA molecule brings to the ribosome during protein synthesis.

Accepted Answer

A)  an amino acid 
B)  RNA polymerase 
C)  a polypeptide 
D)  mRNA 
A)  an amino acid 
B)  RNA polymerase 
C)  a polypeptide 
D)  mRNA

Question 12

Which of the following contains deoxyribose?

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 13

Ribosomes are a collection of

Accepted Answer

A)  proteins and mRNAs that function in translation. 
B)  small proteins that function in translation. 
C)  proteins and tRNAs that function in transcription. 
D)  mRNAs and tRNAs that function in translation. 
E)  proteins and small RNAs that function in translation. 
A)  proteins and mRNAs that function in translation. 
B)  small proteins that function in translation. 
C)  proteins and tRNAs that function in transcription. 
D)  mRNAs and tRNAs that function in translation. 
E)  proteins and small RNAs that function in translation.

Question 14

The strand of the DNA molecule that is transcribed is called the _ strand.

Accepted Answer

The answer of The strand of the DNA molecule that...

Question 15

How many consecutive mRNA bases are needed to specify an amino acid?

Accepted Answer

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

Question 16

Which of the following is NOT a theory of epigenetics explaining how cells can change gene function without changing the DNA base sequence?

Accepted Answer

A)  Altering transcription and translation with noncoding RNA 
B)  Mutations causing new beneficial alleles 
C)  Modification of chromosomal proteins 
D)  Modification of DNA 
A)  Altering transcription and translation with noncoding RNA 
B)  Mutations causing new beneficial alleles 
C)  Modification of chromosomal proteins 
D)  Modification of DNA

Question 17

Based on this table, which polypeptide would be synthesized from the mRNA base sequence AUGCCUGACUUA?

Accepted Answer

A)  phe- met- pro- leu 
B)  met- phe- glu- leu 
C)  met- pro- asp- leu 
D)  met- pro- asp- tyr 
E)  ile- pro- ala- tyr 
A)  phe- met- pro- leu 
B)  met- phe- glu- leu 
C)  met- pro- asp- leu 
D)  met- pro- asp- tyr 
E)  ile- pro- ala- tyr

Question 18

Which of the following has anticodons?

Accepted Answer

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

Question 19

Both DNA and RNA

Accepted Answer

A)  cannot be present in a cell simultaneously. 
B)  contain phosphate groups. 
C)  contain the same four types of nitrogen- containing bases. 
D)  are single- stranded molecules. 
E)  have the same five- carbon sugars. 
A)  cannot be present in a cell simultaneously. 
B)  contain phosphate groups. 
C)  contain the same four types of nitrogen- containing bases. 
D)  are single- stranded molecules. 
E)  have the same five- carbon sugars.

Question 20

Which of the following contains codons?

Accepted Answer

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

Exam 13: Gene Expression and Regulation

A random change in the DNA nucleotide base sequence is called a .

In the intestinal bacteria Escherichia coli, the DNA segment that contains the coding for the enzymes of lactose metabolism is called the lactose .

How can a single gene code for more than one protein?

The fact that calico cats are only female supports the theory of

Messenger RNA is single- stranded.

A "mini- gene" has the base sequence TACCCGTGCACG. Which of the following sequences represents a single base substitution?

If the sequence of bases in a section of DNA is TAGGCTAA, what is the corresponding sequence of bases in mRNA?

Which of the following is noted when comparing DNA and RNA?

Which of the following synthesizes RNA molecules in the nucleus?

In eukaryotes, a promoter that signals the beginning of the gene and binds with the promoter typically consists of

A tRNA molecule brings to the ribosome during protein synthesis.

Which of the following contains deoxyribose?

Ribosomes are a collection of

The strand of the DNA molecule that is transcribed is called the _ strand.

How many consecutive mRNA bases are needed to specify an amino acid?

Which of the following is NOT a theory of epigenetics explaining how cells can change gene function without changing the DNA base sequence?

Based on this table, which polypeptide would be synthesized from the mRNA base sequence AUGCCUGACUUA?

Which of the following has anticodons?

Both DNA and RNA

Which of the following contains codons?

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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