Question 1

DNA polymerase III

Accepted Answer

A)   is needed for adding nucleotides during mRNA synthesis.
B)   synthesizes new DNA only in the 5'to 3'direction.
C)   cannot add nucleotides to the lagging strand.
D)   synthesizes an RNA primer.E) None of the above
F) A) and B)

Question 2

Erythromcycin,a macrolide,inhibits protein synthesis

Accepted Answer

A)   by interfering with both the initiation and elongation stages of translation.
B)   by binding to the tRNA preventing peptide bond formation between amino acids.
C)   by preventing the formation of the initiation complex.
D)   by binding to the ribosome, preventing translocation due to interference with the attachment of mRNA.E) B) and C)
F) C) and D)

Question 3

Proteomics is the study of all proteins that are expressed by an organism,whereas genomics refers to the study of the organism's entire genome,not simply the protein-coding regions.

Accepted Answer

A) True 
 B)False

Question 4

A bacteriophage transfers a random fragment of DNA of the previous host to the current host.This is an example of

Accepted Answer

A)   conjugation.
B)   generalized transduction.
C)   specialized transduction.
D)   the creation of an Hfr cell.E) A) and C)
F) None of the above

Question 5

Structural genes code for

Accepted Answer

A)   ribosomal RNA molecules.
B)   transfer RNA molecules.
C)   cellular proteins.
D)   gene expression elements.E) All of the above
F) A) and C)

Question 6

The development of virulent,toxin-producing bacterial strains due to the presence of a temperate phage can occur through the process of ________.

Accepted Answer

A)   bacterial conjugation
B)   transformation
C)   generalized transduction
D)   specialized transductionE) B) and C)
F) A) and C)

Question 7

A mutation has occurred during DNA replication while the cell was preparing to divide.As a result of this,the codon ACU of mRNA has now become ACC.Interestingly,there is no change to the protein being made.Why not?

Accepted Answer

A)   This is a silent mutation.
B)   The original amino acid isoleucine was changed to leucine, but they are the same variation of amino acid so no change to the protein.
C)   The mutation was fixed, and even though the codon is now ACC the correct amino acid is put into place for the normal protein.
D)   This is not a mutation that causes a big change, so there is no change to the protein being made.E) All of the above
F) None of the above

Question 8

The _____ is all of the genetic material of a cell.

Accepted Answer

A)   proteome
B)   chromosome
C)   genome
D)   plasmid
E)   prophageF) A) and D)
G) C) and E)

Question 9

Repressible operons require that ______ binds to the repressor protein before it can bind to the operator.

Accepted Answer

A)   the product
B)   a cofactor
C)   a coenzyme
D)   the substrate
E)   the reactantF) B) and E)
G) D) and E)

Question 10

Replication of DNA begins at a/an _______ rich area.

Accepted Answer

A)   guanine-cytosine
B)   uracil-adenine
C)   adenine-thymine
D)   adenine-cytosine
E)   guanine-adenineF) B) and C)
G) A) and B)

Question 11

Which of the following is not a type of bacterial DNA recombination?

Accepted Answer

A)   Transformation
B)   Conjugation
C)   Mitosis
D)   TransductionE) None of the above
F) A) and C)

Question 12

The mechanism of DNA synthesis differs between the two new daughter strands during replication.This is due to the fact that

Accepted Answer

A)   both RNA primers attach to the 3'end of the template strands, which are at opposite ends from each other.
B)   both daughter strands can't extend toward the replication fork because there would not be room for two DNA polymerase enzymes.
C)   one RNA primer attaches to the 5'end of the parent strand and the other primer to the 3'end.
D)   the DNA strands run antiparallel to each other and the DNA polymerase can only add nucleotides to the 3' end of the growing strand.E) B) and C)
F) B) and D)

Question 13

Which of the following is incorrect about termination codons?

Accepted Answer

A)   They are also called nonsense codons.
B)   They are the location where the bond between the final tRNA and the polypeptide is broken.
C)   They include AUG.
D)   They are UAA, UAG, and UGA.
E)   They do not have corresponding tRNA.F) C) and D)
G) A) and D)

Question 14

Which is incorrect about inducible operons?

Accepted Answer

A)   They have genes turned off by a buildup of end product.
B)   They are often for use in catabolic pathways.
C)   They are normally turned off.
D)   They are turned on by the substrate of the enzyme.
E)   They include the lac operon.F) A) and B)
G) B) and D)

Question 15

DNA replication proceeds in one direction around the bacterial chromosome.

Accepted Answer

A) True 
 B)False

Question 16

What type of mutation alters the base but not the amino acid being coded for?

Accepted Answer

A)   Silent
B)   Back
C)   Point
D)   Nonsense
E)   MissenseF) A) and B)
G) B) and D)

Question 17

DNA Polymerase I

Accepted Answer

A)   removes primers.
B)   adds bases to new DNA chain.
C)   seals DNA gaps.
D)   proofreads DNA chain.E) A) and B)
F) All of the above

Question 18

A nucleosome is a linear chromosome wound around the _______.

Accepted Answer

A)   nuclear membrane
B)   rRNA
C)   mRNA
D)   histone
E)   nucleolusF) C) and D)
G) B) and D)

Question 19

Each nucleotide is composed of

Accepted Answer

A)   one phosphate, one nitrogenous base, and one sugar.
B)   one phosphate, one nitrogenous base, and two sugars.
C)   two phosphates, one nitrogenous base, and one sugar.
D)   two phosphates, one nitrogenous base, and two sugars.
E)   one phosphate, two nitrogenous bases, and one sugar.F) A) and B)
G) None of the above

Question 20

Microorganisms exhibit genomes contained on

Accepted Answer

A)   chromosomes.
B)   plasmids.
C)   mitochondrial DNA.
D)   chloroplast DNA.
E)   All of the choices are correct depending on the type of microorganism observed.F) A) and C)
G) A) and E)

Exam 9: Microbial Genetics

Microorganisms exhibit genomes contained on

Correct AnswerverifiedShow Answer

What type of mutation alters the base but not the amino acid being coded for?

Correct AnswerverifiedShow Answer

The development of virulent,toxin-producing bacterial strains due to the presence of a temperate phage can occur through the process of ________.

Correct AnswerverifiedShow Answer

A bacteriophage transfers a random fragment of DNA of the previous host to the current host.This is an example of

Correct AnswerverifiedShow Answer

Which of the following is incorrect about termination codons?

Correct AnswerverifiedShow Answer

A mutation has occurred during DNA replication while the cell was preparing to divide.As a result of this,the codon ACU of mRNA has now become ACC.Interestingly,there is no change to the protein being made.Why not?

Correct AnswerverifiedShow Answer

The _____ is all of the genetic material of a cell.

Correct AnswerverifiedShow Answer

DNA replication proceeds in one direction around the bacterial chromosome.

Correct AnswerverifiedShow Answer

The mechanism of DNA synthesis differs between the two new daughter strands during replication.This is due to the fact that

Correct AnswerverifiedShow Answer

Each nucleotide is composed of

Correct AnswerverifiedShow Answer

Proteomics is the study of all proteins that are expressed by an organism,whereas genomics refers to the study of the organism's entire genome,not simply the protein-coding regions.

Correct AnswerverifiedShow Answer

Which is incorrect about inducible operons?

Correct AnswerverifiedShow Answer

Erythromcycin,a macrolide,inhibits protein synthesis

Correct AnswerverifiedShow Answer

DNA polymerase III

Correct AnswerverifiedShow Answer

DNA Polymerase I

Correct AnswerverifiedShow Answer

Which of the following is not a type of bacterial DNA recombination?

Correct AnswerverifiedShow Answer

Structural genes code for

Correct AnswerverifiedShow Answer

Repressible operons require that ______ binds to the repressor protein before it can bind to the operator.

Correct AnswerverifiedShow Answer

A nucleosome is a linear chromosome wound around the _______.

Correct AnswerverifiedShow Answer

Replication of DNA begins at a/an _______ rich area.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified