Question 1

After the DNA is unwound at the site of DNA replication initiation,what binds to the unwound DNA to prevent it from reannealing?

Accepted Answer

A)  DNA gyrase 
B)  single-stranded DNA binding protein 
C)  DnaA 
D)  DNA polymerase 
E)  DnaB 
A)  DNA gyrase 
B)  single-stranded DNA binding protein 
C)  DnaA 
D)  DNA polymerase 
E)  DnaB

Question 2

Why is the genetic code considered degenerate?

Accepted Answer

The genetic code is considered degenerat

Question 3

Replication termination in E.coli involves which two proteins?

Accepted Answer

A)  Tus protein and topoisomerase II. 
B)  helicase and DnaG. 
C)  helicase and topoisomerase II. 
D)  Tus protein and DnaG. 
E)  Tus protein and helicase. 
A)  Tus protein and topoisomerase II. 
B)  helicase and DnaG. 
C)  helicase and topoisomerase II. 
D)  Tus protein and DnaG. 
E)  Tus protein and helicase.

Question 4

A gene can best be described as a segment of DNA that:

Accepted Answer

A)  encodes for a protein. 
B)  encodes for a protein or functional RNA. 
C)  is transcribed as well as the associated regulatory regions. 
D)  encodes for a protein as well as the associated regulatory regions. 
E)  is transcribed. 
A)  encodes for a protein. 
B)  encodes for a protein or functional RNA. 
C)  is transcribed as well as the associated regulatory regions. 
D)  encodes for a protein as well as the associated regulatory regions. 
E)  is transcribed.

Question 5

Which statement below is FALSE regarding replication of the bacterial chromosome?

Accepted Answer

A)  Replication occurs in a bidirectional manner from the origin of replication. 
B)  The leading strand is replicated in the 5' to 3' direction and the lagging strand in the 3' to 5' direction. 
C)  The primase adds a short RNA primer to serve as a starting point for the DNA polymerase to add new bases. 
D)  DNA replication is a semi-conservative process, where one strand serves as a template for the synthesis of a complementary strand. 
E)  The incoming nucleotide triphosphate is covalently attached to the free 3' hydroxyl. 
A)  Replication occurs in a bidirectional manner from the origin of replication. 
B)  The leading strand is replicated in the 5' to 3' direction and the lagging strand in the 3' to 5' direction. 
C)  The primase adds a short RNA primer to serve as a starting point for the DNA polymerase to add new bases. 
D)  DNA replication is a semi-conservative process, where one strand serves as a template for the synthesis of a complementary strand. 
E)  The incoming nucleotide triphosphate is covalently attached to the free 3' hydroxyl.

Question 6

In DNA replication nucleotides are always added in the 5' to 3' direction.

Accepted Answer

A) True 
 B)False

Question 7

Describe the structure of DNA according to the Watson - Crick Model.

Accepted Answer

The structure of DNA according to the Wa

Question 8

What are the main enzymes responsible for replication of DNA in eukaryal cells?

Accepted Answer

A)  DNA pol III and DNA pol I 
B)  DNA pol III and DNA pol α 
C)  DNA pol I and DNA pol ε 
D)  DNA pol α and DNA pol ε 
E)  DNA pol ε and DNA pol δ 
A)  DNA pol III and DNA pol I 
B)  DNA pol III and DNA pol α 
C)  DNA pol I and DNA pol ε 
D)  DNA pol α and DNA pol ε 
E)  DNA pol ε and DNA pol δ

Question 9

For the initiation of transcription in bacteria,RNA polymerase binds to what region on the gene?

Accepted Answer

A)  promoter 
B)  operator 
C)  enhancer region 
D)  origin of replication 
E)  Shine-Dalgarno sequence 
A)  promoter 
B)  operator 
C)  enhancer region 
D)  origin of replication 
E)  Shine-Dalgarno sequence

Question 10

Which of these would a signal peptide be used for?

Accepted Answer

A)  To regulate translation. 
B)  To move a protein to the outside of the cell. 
C)  To help a protein fold correctly. 
D)  To help regulate the activity of an enzyme. 
E)  To initiate DNA replication. 
A)  To regulate translation. 
B)  To move a protein to the outside of the cell. 
C)  To help a protein fold correctly. 
D)  To help regulate the activity of an enzyme. 
E)  To initiate DNA replication.

Question 11

The -10 element of the bacterial promoter is also referred to as the _______ _____.

Accepted Answer

The answer of The -10 element of the bacterial promoter...

Question 12

The RNA polymerase in Archaea is more similar to Bacteria RNA polymerase than Eukarya RNA polymerase II.

Accepted Answer

A) True 
 B)False

Question 13

Which of these is a term for a point mutation that results in a change in the amino acid specificity of the codon?

Accepted Answer

A)  frameshift 
B)  silent 
C)  nonsense 
D)  missense 
E)  amber 
A)  frameshift 
B)  silent 
C)  nonsense 
D)  missense 
E)  amber

Question 14

Which enzyme is responsible for adding the final bases to the end of a chromosome during DNA replication in eukaryal cells?

Accepted Answer

A)  DNA polδ 
B)  DNA polα 
C)  DNA primase B 
D)  telomerase 
E)  topoisomerase 
A)  DNA polδ 
B)  DNA polα 
C)  DNA primase B 
D)  telomerase 
E)  topoisomerase

Question 15

The Watson-Crick model of DNA shows that the base adenine pairs with:

Accepted Answer

A)  cytosine while guanine pairs with thymine. 
B)  guanine while cytosine pairs with thymine. 
C)  thymine while cytosine pairs with guanine. 
D)  either thymine or guanine, while cytosine pairs with either thymine or guanine. 
E)  either thymine or cytosine while guanine pairs with either thymine or cytosine. 
A)  cytosine while guanine pairs with thymine. 
B)  guanine while cytosine pairs with thymine. 
C)  thymine while cytosine pairs with guanine. 
D)  either thymine or guanine, while cytosine pairs with either thymine or guanine. 
E)  either thymine or cytosine while guanine pairs with either thymine or cytosine.

Question 16

Most bacterial promoters consist of two regions: __________ and ___________.

Accepted Answer

A)  Pribnow box and operator. 
B)  enhancer region and operator. 
C)  enhancer region and -35 region. 
D)  -35 region and operator. 
E)  Pribnow box and -35 region. 
A)  Pribnow box and operator. 
B)  enhancer region and operator. 
C)  enhancer region and -35 region. 
D)  -35 region and operator. 
E)  Pribnow box and -35 region.

Question 17

What is the first protein to bind to the oriC region of the DNA molecule to start the replication process?

Accepted Answer

A)  DNA polymerase 
B)  the primase 
C)  DnaA 
D)  gyrase 
E)  DnaI 
A)  DNA polymerase 
B)  the primase 
C)  DnaA 
D)  gyrase 
E)  DnaI

Question 18

Describe the process of mRNA processing in eukaryal cells.

Accepted Answer

In eukaryotic cells, mRNA processing inv

Question 19

Which of these results from a deletion of base pairs such that the amino acid sequence is disrupted from that point downward?

Accepted Answer

A)  transversion mutation 
B)  transition mutation 
C)  nonsense mutation 
D)  missense mutation 
E)  frameshift mutation 
A)  transversion mutation 
B)  transition mutation 
C)  nonsense mutation 
D)  missense mutation 
E)  frameshift mutation

Question 20

The Shine-Dalgarno sequence on a mRNA is recognized by the __________ of the 30S ribosome.

Accepted Answer

The answer of The Shine-Dalgarno sequence on a mRNA is...

Exam 7: DNA Replication and Gene Expression

After the DNA is unwound at the site of DNA replication initiation,what binds to the unwound DNA to prevent it from reannealing?

Why is the genetic code considered degenerate?

Replication termination in E.coli involves which two proteins?

A gene can best be described as a segment of DNA that:

Which statement below is FALSE regarding replication of the bacterial chromosome?

In DNA replication nucleotides are always added in the 5' to 3' direction.

Describe the structure of DNA according to the Watson - Crick Model.

What are the main enzymes responsible for replication of DNA in eukaryal cells?

For the initiation of transcription in bacteria,RNA polymerase binds to what region on the gene?

Which of these would a signal peptide be used for?

The -10 element of the bacterial promoter is also referred to as the _______ _____.

The RNA polymerase in Archaea is more similar to Bacteria RNA polymerase than Eukarya RNA polymerase II.

Which of these is a term for a point mutation that results in a change in the amino acid specificity of the codon?

Which enzyme is responsible for adding the final bases to the end of a chromosome during DNA replication in eukaryal cells?

The Watson-Crick model of DNA shows that the base adenine pairs with:

Most bacterial promoters consist of two regions: __________ and ___________.

What is the first protein to bind to the oriC region of the DNA molecule to start the replication process?

Describe the process of mRNA processing in eukaryal cells.

Which of these results from a deletion of base pairs such that the amino acid sequence is disrupted from that point downward?

The Shine-Dalgarno sequence on a mRNA is recognized by the __________ of the 30S ribosome.

The Microbial World

Bacteria

Eukaryal Microbes

Archaea

Viruses

Cultivating Microorganisms

Viral Replication Strategies

Bacterial Genetic Analysis

Microbial Genomics

Regulation of Gene Expression

Microbial Biotechnology

Metabolism

Biogeochemical Cycles

Microbial Ecosystems

The Microbiology of Food and Water

Microbial Symbionts

Introduction to Infectious Diseases

Innate Host Defenses Against Microbial Invasion

Adaptive Immunity

Survival in the Host

Viral Pathogenesis

Eukaryal Microbe Pathogenesis

Control of Infectious Diseases

Filters

The -10 element of the bacterial promoter is also referred to as the ___ _.

Most bacterial promoters consist of two regions: and _.