Question 1

What is the role of the enzyme ligase in DNA replication?

Accepted Answer

A)  It unzips the double-stranded DNA. 
B)  It seals any breaks in the sugar-phosphate backbone. 
C)  It breaks the hydrogen bonds that hold the two strands of the DNA together. 
D)  It matches new bases to the old strand by complementary base pairing. 
E)  It folds the DNA into a coiled structure. 
A)  It unzips the double-stranded DNA. 
B)  It seals any breaks in the sugar-phosphate backbone. 
C)  It breaks the hydrogen bonds that hold the two strands of the DNA together. 
D)  It matches new bases to the old strand by complementary base pairing. 
E)  It folds the DNA into a coiled structure.

Question 2

In the RNA sequence CAAUGACCAG, what will be the first amino acid incorporated?

Accepted Answer

A)  alanine 
B)  glutamine 
C)  methionine 
D)  valine 
E)  glycine 
A)  alanine 
B)  glutamine 
C)  methionine 
D)  valine 
E)  glycine

Question 3

Which of the following would be an example of pretranscriptional control?

Accepted Answer

A)  The chromosomes must decondense. 
B)  Transcription factors help initiate transcription. 
C)  The mRNA is processed before it leaves the nucleus. 
D)  The life expectancy of the mRNA molecules vary. 
E)  The polypeptide product is folded to form its functional conformation. 
A)  The chromosomes must decondense. 
B)  Transcription factors help initiate transcription. 
C)  The mRNA is processed before it leaves the nucleus. 
D)  The life expectancy of the mRNA molecules vary. 
E)  The polypeptide product is folded to form its functional conformation.

Question 4

In what way are DNA and RNA similar?

Accepted Answer

A)  Both contain C, A, and G. 
B)  Both contain deoxyribose. 
C)  Both contain U, C, and G. 
D)  Both are single stranded. 
E)  Both form a double helix. 
A)  Both contain C, A, and G. 
B)  Both contain deoxyribose. 
C)  Both contain U, C, and G. 
D)  Both are single stranded. 
E)  Both form a double helix.

Question 5

The denaturation of which enzyme would lead to incorrect base pairing of nucleotides during DNA replication?

Accepted Answer

A)  DNA polymerase 
B)  DNA ligase 
C)  DNA helicase 
D)  binding proteins 
E)  Okazaki fragments 
A)  DNA polymerase 
B)  DNA ligase 
C)  DNA helicase 
D)  binding proteins 
E)  Okazaki fragments

Question 6

Which of the following nucleotide sequences could give rise to the amino acid sequence alanine-asparatate-glycine? Assume that translation initiation has already occurred.

Accepted Answer

A)  GUUAAGAGG 
B)  GCCGACGGC 
C)  CACCGCCGA 
D)  GAUGGUGCU 
E)  UUUUAAUGG 
A)  GUUAAGAGG 
B)  GCCGACGGC 
C)  CACCGCCGA 
D)  GAUGGUGCU 
E)  UUUUAAUGG

Question 7

List and explain the 5 steps involved in DNA replication.

Accepted Answer

1. The enzyme DNA helicase unwinds and u

Question 8

Which of the following is not a type of mRNA processing?

Accepted Answer

A)  adding a cap 
B)  cleaving off the methionine 
C)  adding a tail 
D)  removing the introns 
E)  splicing 
A)  adding a cap 
B)  cleaving off the methionine 
C)  adding a tail 
D)  removing the introns 
E)  splicing

Question 9

In vivo gene therapy has been used to help patients suffering from cystic fibrosis.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following occurs during initiation of translation?

Accepted Answer

A)  The ribosome moves down one codon so that the A site is available to receive an incoming tRNA. 
B)  The mRNA binds to the smaller of the two ribosomal subunits. 
C)  The polypeptide lengthens one amino acid at a time. 
D)  The ribosome dissociates into its two subunits and falls off the mRNA. 
E)  One of the three stop codons is reached. 
A)  The ribosome moves down one codon so that the A site is available to receive an incoming tRNA. 
B)  The mRNA binds to the smaller of the two ribosomal subunits. 
C)  The polypeptide lengthens one amino acid at a time. 
D)  The ribosome dissociates into its two subunits and falls off the mRNA. 
E)  One of the three stop codons is reached.

Question 11

One of the disadvantages of PCR is that it requires large amounts of starting material.

Accepted Answer

The answer of One of the disadvantages of PCR is...

Question 12

If the codon is CCA, what is the anticodon and what amino acid will be inserted?

Accepted Answer

A)  CCA, proline 
B)  GGU, proline 
C)  GGT, glycine 
D)  ACC, threonine 
E)  UGG, tryptophan 
A)  CCA, proline 
B)  GGU, proline 
C)  GGT, glycine 
D)  ACC, threonine 
E)  UGG, tryptophan

Question 13

How does modern day sequencing detect dyes on the nucleotides?

Accepted Answer

A)  radioactivity 
B)  dye terminator chemicals 
C)  DNA breakage 
D)  laser 
E)  by eye 
A)  radioactivity 
B)  dye terminator chemicals 
C)  DNA breakage 
D)  laser 
E)  by eye

Question 14

How many genes did researchers think the human genome contained? How many did it contain?

Accepted Answer

A)  3 billion; 80,000 
B)  1 million; 1 million 
C)  25,000; 80,000 
D)  80,000; 25,000 
E)  125 million; 1 million 
A)  3 billion; 80,000 
B)  1 million; 1 million 
C)  25,000; 80,000 
D)  80,000; 25,000 
E)  125 million; 1 million

Question 15

Which of the following is not involved in gene cloning?

Accepted Answer

A)  host cell 
B)  vector 
C)  restriction enzyme 
D)  dyes attached to nucleotides 
E)  "sticky" ends 
A)  host cell 
B)  vector 
C)  restriction enzyme 
D)  dyes attached to nucleotides 
E)  "sticky" ends

Question 16

Place the following steps in order for the cloning of a gene. 1. DNA ligase seals foreign DNA into a plasmid. 2.A restriction enzyme is used to cleave DNA. 3. The bacterium makes a product. 4. Some of the bacterial cells take up a recombinant plasmid. 5. The plasmid replicates on its own.

Accepted Answer

A)  2,1,4,5,3 
B)  1,2,3,4,5 
C)  3,1,2,4,5 
D)  5,1,4,3,2 
E)  1,3,2,4,5 
A)  2,1,4,5,3 
B)  1,2,3,4,5 
C)  3,1,2,4,5 
D)  5,1,4,3,2 
E)  1,3,2,4,5

Question 17

The 3-base sequence in a mRNA molecule is called a(n)

Accepted Answer

A)  codon. 
B)  transcriptome. 
C)  initiator. 
D)  mutation. 
E)  transposon. 
A)  codon. 
B)  transcriptome. 
C)  initiator. 
D)  mutation. 
E)  transposon.

Question 18

Which of the following is not studied in the field of proteomics?

Accepted Answer

A)  protein-protein interactions 
B)  protein concentration in a cell 
C)  which genes give rise to which proteins 
D)  cellular location of particular proteins 
E)  chemical modifications of proteins 
A)  protein-protein interactions 
B)  protein concentration in a cell 
C)  which genes give rise to which proteins 
D)  cellular location of particular proteins 
E)  chemical modifications of proteins

Question 19

The bases in DNA are complementary. A always binds with

Accepted Answer

A)  A. 
B)  C. 
C)  G. 
D)  T. 
E)  U. 
A)  A. 
B)  C. 
C)  G. 
D)  T. 
E)  U.

Question 20

DNA replication is considered

Accepted Answer

A)  conservative. 
B)  semiconservative. 
C)  dispersive. 
D)  relaxed. 
E)  stringent. 
A)  conservative. 
B)  semiconservative. 
C)  dispersive. 
D)  relaxed. 
E)  stringent.

Exam 21: DNA Biology and Technology

What is the role of the enzyme ligase in DNA replication?

In the RNA sequence CAAUGACCAG, what will be the first amino acid incorporated?

Which of the following would be an example of pretranscriptional control?

In what way are DNA and RNA similar?

The denaturation of which enzyme would lead to incorrect base pairing of nucleotides during DNA replication?

Which of the following nucleotide sequences could give rise to the amino acid sequence alanine-asparatate-glycine? Assume that translation initiation has already occurred.

List and explain the 5 steps involved in DNA replication.

Which of the following is not a type of mRNA processing?

In vivo gene therapy has been used to help patients suffering from cystic fibrosis.

Which of the following occurs during initiation of translation?

One of the disadvantages of PCR is that it requires large amounts of starting material.

If the codon is CCA, what is the anticodon and what amino acid will be inserted?

How does modern day sequencing detect dyes on the nucleotides?

How many genes did researchers think the human genome contained? How many did it contain?

Which of the following is not involved in gene cloning?

Place the following steps in order for the cloning of a gene. 1. DNA ligase seals foreign DNA into a plasmid. 2.A restriction enzyme is used to cleave DNA. 3. The bacterium makes a product. 4. Some of the bacterial cells take up a recombinant plasmid. 5. The plasmid replicates on its own.

The 3-base sequence in a mRNA molecule is called a(n)

Which of the following is not studied in the field of proteomics?

The bases in DNA are complementary. A always binds with

DNA replication is considered

Exploring Life and Science

Chemistry of Life

Cell Structure and Function

Organization and Regulation of Body Systems

Cardiovascular System: Heart and Blood Vessels

Cardiovascular System: Blood

The Lymphatic and Immune Systems

Digestive System and Nutrition

Respiratory System

Urinary System

Skeletal System

Muscular System

Nervous System

Senses

Endocrine System

Reproductive System

Human Development and Aging

Patterns of Chromosome Inheritance

Cancer

Patterns of Genetic Inheritance

Human Evolution

Global Ecology and Human Interferences

Human Population, Planetary Resources, and Conservation

Infectious Diseases Supplement

Filters