Question 1

Which of these is a point mutation that results in changing a codon from an amino acid codon to a stop codon?

Accepted Answer

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

Question 2

Initiation of translation in bacteria starts with the binding of the 30S ribosomal subunit to the mRNA molecule.The ribosomal binding site is nearer the _________ end of the mRNA molecule and is called the ________.

Accepted Answer

A)  3'; Pribnow box 
B)  3'; Shine-Dalgarno sequence 
C)  3'; Rho sequence 
D)  5'; Shine-Dalgarno sequence 
E)  5'; Rho sequence 
A)  3'; Pribnow box 
B)  3'; Shine-Dalgarno sequence 
C)  3'; Rho sequence 
D)  5'; Shine-Dalgarno sequence 
E)  5'; Rho sequence D

Question 3

What is a codon?

Accepted Answer

A)  Four bases on the mRNA that is read by the ribosome in the 3' to 5' direction. 
B)  Four bases on the mRNA that is read by the ribosome in the 5' to 3' direction. 
C)  Three bases on the mRNA that is read by the ribosome in the 3' to 5' direction. 
D)  Three bases on the mRNA that is read by the ribosome in the 5' to 3' direction. 
E)  Two bases on the mRNA that is read by the ribosome in the 5' to 3' direction. 
A)  Four bases on the mRNA that is read by the ribosome in the 3' to 5' direction. 
B)  Four bases on the mRNA that is read by the ribosome in the 5' to 3' direction. 
C)  Three bases on the mRNA that is read by the ribosome in the 3' to 5' direction. 
D)  Three bases on the mRNA that is read by the ribosome in the 5' to 3' direction. 
E)  Two bases on the mRNA that is read by the ribosome in the 5' to 3' direction. D

Question 4

In eukaryal cells,what does RNA polymerase II transcribe?

Accepted Answer

A)  tRNA genes 
B)  small regulatory RNAs 
C)  the 5S and 18S rRNAs 
D)  mRNA genes 
E)  rRNAs genes 
A)  tRNA genes 
B)  small regulatory RNAs 
C)  the 5S and 18S rRNAs 
D)  mRNA genes 
E)  rRNAs genes

Question 5

In the same bacterial cell,different sigma factors are able to control the expression of large blocks of genes.

Accepted Answer

A) True 
 B)False

Question 6

How do nucleotides connect to adjacent nucleotides in the Watson-Crick model of DNA?

Accepted Answer

A)  Via a covalent bond between the 3' hydroxyl of one nucleotide and the 2' deoxy of the other. 
B)  Via a hydrogen bond between the nitrogenous base of one nucleotide and the nitrogenous base of the other. 
C)  Via a hydrogen bond between the nitrogenous base of one nucleotide and the 5' phosphate of the other. 
D)  Via a covalent bond between the 3' hydroxyl of one nucleotide and the nitrogenous base of the other. 
E)  Via a covalent bond between the 3' hydroxyl of one nucleotide and the 5' phosphate of the other. 
A)  Via a covalent bond between the 3' hydroxyl of one nucleotide and the 2' deoxy of the other. 
B)  Via a hydrogen bond between the nitrogenous base of one nucleotide and the nitrogenous base of the other. 
C)  Via a hydrogen bond between the nitrogenous base of one nucleotide and the 5' phosphate of the other. 
D)  Via a covalent bond between the 3' hydroxyl of one nucleotide and the nitrogenous base of the other. 
E)  Via a covalent bond between the 3' hydroxyl of one nucleotide and the 5' phosphate of the other.

Question 7

The origin of replication site in yeast is called the _____ _______ sequence.

Accepted Answer

autonomous

Question 8

After the translational process the polypeptide folds into the appropriate conformation for proper functioning.What group of proteins aids in protein folding?

Accepted Answer

A)  proteases 
B)  cytokines 
C)  chaperonins 
D)  peptidases 
E)  lipases 
A)  proteases 
B)  cytokines 
C)  chaperonins 
D)  peptidases 
E)  lipases

Question 9

What are micro RNAs?

Accepted Answer

A)  mRNAs that encode for regulatory proteins 
B)  small regulatory RNAs 
C)  tRNAs 
D)  rRNAs 
E)  small mRNAs 
A)  mRNAs that encode for regulatory proteins 
B)  small regulatory RNAs 
C)  tRNAs 
D)  rRNAs 
E)  small mRNAs

Question 10

The mRNA of bacterial cells is often polycistronic.What does this term mean?

Accepted Answer

A)  It can be translated more than once. 
B)  It contains the code for multiple peptides. 
C)  It can be translated from either end. 
D)  It is transcribed from multiple sites on the chromosome. 
E)  The translated protein may be modified in different ways. 
A)  It can be translated more than once. 
B)  It contains the code for multiple peptides. 
C)  It can be translated from either end. 
D)  It is transcribed from multiple sites on the chromosome. 
E)  The translated protein may be modified in different ways.

Question 11

What is the sigma factor of the RNA polymerase holoenzyme responsible for?

Accepted Answer

A)  initiation of transcription 
B)  recognition of the promoter region 
C)  transcription elongation 
D)  transcription termination 
E)  ribosome binding 
A)  initiation of transcription 
B)  recognition of the promoter region 
C)  transcription elongation 
D)  transcription termination 
E)  ribosome binding

Question 12

What,in bacteria,is analogous to the autonomously replicating sequence (ARS)in yeast?

Accepted Answer

A)  the promoter 
B)  a plasmid 
C)  a transposon 
D)  the oriC 
E)  a prophage 
A)  the promoter 
B)  a plasmid 
C)  a transposon 
D)  the oriC 
E)  a prophage

Question 13

All living organisms use the same genetic code for the translation of mRNA.

Accepted Answer

A) True 
 B)False

Question 14

Replication of the bacterial chromosome begins at how many locations?

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
E)  five 
A)  one 
B)  two 
C)  three 
D)  four 
E)  five

Question 15

The DNA replication process in Archaea more closely resembles that in Eukarya than in Bacteria.

Accepted Answer

A) True 
 B)False

Question 16

What did the experiment by Avery,MacLeod,and McCarty in 1944 with the R and S strains of Streptococcus pneumoniae demonstrate?

Accepted Answer

A)  DNA was the genetic material in cells. 
B)  R strain phenotype could spontaneously revert to S strain phenotype. 
C)  Genetic material from one strain could be transferred to another strain. 
D)  The ability of these bacteria to kill mice. 
E)  That some strains of Streptococcus were not pathogenic. 
A)  DNA was the genetic material in cells. 
B)  R strain phenotype could spontaneously revert to S strain phenotype. 
C)  Genetic material from one strain could be transferred to another strain. 
D)  The ability of these bacteria to kill mice. 
E)  That some strains of Streptococcus were not pathogenic.

Question 17

Describe the process of DNA replication initiation in Bacteria.

Accepted Answer

DNA replication initiation in bacteria b

Question 18

The site on the DNA molecule that is recognized by the sigma subunit of the RNA polymerase for binding to start transcription is called the _________.

Accepted Answer

The answer of The site on the DNA molecule that...

Question 19

What did the experiment by Fred Griffith in 1928 with the R and S strains of Streptococcus pneumoniae demonstrate?

Accepted Answer

A)  DNA was the genetic material in cells. 
B)  R strain phenotype could spontaneously revert to S strain phenotype. 
C)  Genetic material from one strain could be transferred to another strain. 
D)  The ability of these bacteria to kill mice. 
E)  That some strains of Streptococcus were not pathogenic. 
A)  DNA was the genetic material in cells. 
B)  R strain phenotype could spontaneously revert to S strain phenotype. 
C)  Genetic material from one strain could be transferred to another strain. 
D)  The ability of these bacteria to kill mice. 
E)  That some strains of Streptococcus were not pathogenic.

Question 20

Replication of eukaryal DNA requires RNA primer synthesis.

Accepted Answer

A) True 
 B)False

Exam 7: DNA Replication and Gene Expression

Which of these is a point mutation that results in changing a codon from an amino acid codon to a stop codon?

Initiation of translation in bacteria starts with the binding of the 30S ribosomal subunit to the mRNA molecule.The ribosomal binding site is nearer the _________ end of the mRNA molecule and is called the ________.

What is a codon?

In eukaryal cells,what does RNA polymerase II transcribe?

In the same bacterial cell,different sigma factors are able to control the expression of large blocks of genes.

How do nucleotides connect to adjacent nucleotides in the Watson-Crick model of DNA?

The origin of replication site in yeast is called the _____ _______ sequence.

After the translational process the polypeptide folds into the appropriate conformation for proper functioning.What group of proteins aids in protein folding?

What are micro RNAs?

The mRNA of bacterial cells is often polycistronic.What does this term mean?

What is the sigma factor of the RNA polymerase holoenzyme responsible for?

What,in bacteria,is analogous to the autonomously replicating sequence (ARS)in yeast?

All living organisms use the same genetic code for the translation of mRNA.

Replication of the bacterial chromosome begins at how many locations?

The DNA replication process in Archaea more closely resembles that in Eukarya than in Bacteria.

What did the experiment by Avery,MacLeod,and McCarty in 1944 with the R and S strains of Streptococcus pneumoniae demonstrate?

Describe the process of DNA replication initiation in Bacteria.

The site on the DNA molecule that is recognized by the sigma subunit of the RNA polymerase for binding to start transcription is called the _________.

What did the experiment by Fred Griffith in 1928 with the R and S strains of Streptococcus pneumoniae demonstrate?

Replication of eukaryal DNA requires RNA primer synthesis.

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

Initiation of translation in bacteria starts with the binding of the 30S ribosomal subunit to the mRNA molecule.The ribosomal binding site is nearer the _ end of the mRNA molecule and is called the .

The origin of replication site in yeast is called the _ ___ sequence.