Question 1

A screening system called the _____ test is used for detecting chemicals with carcinogenic potential.

Accepted Answer

A)  Koch
B)  Ames
C)  Mutation
D)  Cancer
E)  IowaF) None of the above
G) B) and D)

Question 2

A mutation that changes a normal codon to a stop codon is called a

Accepted Answer

A)  Point mutation
B)  Silent mutation
C)  Back mutation
D)  Missense mutation
E)  Nonsense mutationF) B) and E)
G) None of the above

Question 3

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

Accepted Answer

A)  Chromosome
B)  Plasmid
C)  Prophage
D)  Genome
E)  ProteomeF) A) and D)
G) A) and C)

Question 4

Bacterial conjugation involves

Accepted Answer

A)  Bacteriophage carrying donor DNA to the recipient cell
B)  A donor cell with a plasmid that synthesizes a pilus
C)  Naked DNA fragments from a lysed donor cell are taken up by a recipient cell
D)  New progeny cells with genes from two parent bacterial cells
E)  None of the choices are correctF) All of the above
G) C) and D)

Question 5

The transfer of DNA fragments from a dead cell to a live, competent recipient cell that results in a changed recipient cell is

Accepted Answer

A)  Transduction
B)  Conjugation
C)  Transformation
D)  Transmission
E)  MitosisF) C) and D)
G) All of the above

Question 6

The DNA of microorganisms is made up of subunits called

Accepted Answer

A)  Histones
B)  Amino acids
C)  Nucleotides
D)  mRNA
E)  PolymerasesF) A) and B)
G) C) and E)

Question 7

Gene regulation can involve a protein repressor that blocks _____ from initiating transcription.

Accepted Answer

A)  DNA polymerase I
B)  DNA polymerase III
C)  RNA polymerase
D)  mRNA
E)  rRNAF) B) and E)
G) A) and C)

Question 8

The antiparallel arrangement within DNA molecules refers to

Accepted Answer

A)  Each base bonding at the 1' position of the sugar
B)  A purine always bonding to a pyrimidine
C)  One helix strand that runs from the 5' to 3' direction and the other strand runs from the 3' to 5' direction
D)  An original parent DNA strand and one newly synthesized DNA strand comprising a new DNA molecule
E)  None of the choices are correctF) C) and D)
G) A) and B)

Question 9

Hfr transfer involves all of the following except

Accepted Answer

A)  Gene integration into the bacterial chromosome
B)  Plasmid gene transfer
C)  F factor is part of the F+ donor chromosome
D)  High frequency transfer
E)  A pilus connection between F+ and F- cellsF) A) and B)
G) A) and E)

Question 10

All of the following pertain to transcription except

Accepted Answer

A)  Occurs on a ribosome in the cytoplasm
B)  Occurs before translation
C)  Requires RNA polymerase
D)  Requires a template DNA strand
E)  Is a process of protein synthesisF) B) and E)
G) A) and E)

Question 11

Synthesis of an inducible enzyme requires

Accepted Answer

A)  Repressor alone bound to operator
B)  Substrate bound to repressor
C)  Substrate bound to promoter
D)  Co repressor and repressor binding to operator
E)  None of the choices are correctF) B) and D)
G) A) and B)

Question 12

If the wild type DNA sequence reads THE CAT ATE THE BIG RAT, what type of mutation would change the sequence to THE CAT ATA ETH EBI GRA T?

Accepted Answer

A)  Missense
B)  Nonsense
C)  Insertion
D)  Deletion
E)  SilentF) A) and B)
G) C) and E)

Question 13

The process in which mutations are removed and the correct bases added is called

Accepted Answer

A)  Transduction
B)  Excision repair
C)  Frameshift
D)  Back-mutation
E)  TransformationF) A) and B)
G) C) and D)

Question 14

Each nucleotide is composed of

Accepted Answer

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

Question 15

All of the following pertain to nitrogenous bases except

Accepted Answer

A)  Form pairs by hydrogen bonding
B)  Guanine pairs with uracil
C)  Adenine pairs with thymine
D)  Cytosine and thymine are pyrimidines
E)  Allows variation from one nucleotide to another which creates the encoded informationF) A) and B)
G) A) and C)

Question 16

RNA molecules differ from DNA molecules because only RNA

Accepted Answer

A)  Has ribose
B)  Has uracil
C)  Is typically one strand of nucleotides
D)  Does not have thymine
E)  All of the choices are correctF) D) and E)
G) C) and E)

Question 17

Among the microorganisms, various genomes can include

Accepted Answer

A)  Chromosomes
B)  Plasmids
C)  Mitochondrial DNA
D)  Chloroplast DNA
E)  All of the choices are correctF) B) and D)
G) D) and E)

Question 18

Which is incorrect about purines?

Accepted Answer

A)  Only found in DNA, not in RNA
B)  Are nitrogenous bases
C)  Always paired with a specific pyrimidine
D)  Include adenine and guanine
E)  Found within nucleotidesF) None of the above
G) A) and D)

Question 19

Semiconservative replication refers to

Accepted Answer

A)  Each base bonding at the 1' position of the sugar
B)  A purine always bonding to a pyrimidine
C)  One helix strand that runs from the 5' to 3' direction and the other strand runs from the 3' to 5' direction
D)  An original parent DNA strand and one newly synthesized DNA strand comprising a new DNA molecule
E)  None of the choices are correctF) None of the above
G) A) and D)

Question 20

Transcription occurs in the nucleus or at the nucleoid.

Accepted Answer

A) True 
 B)False

Exam 9: An Introduction to Microbial Genetics

RNA molecules differ from DNA molecules because only RNA

Correct AnswerverifiedShow Answer

Synthesis of an inducible enzyme requires

Correct AnswerverifiedShow Answer

If the wild type DNA sequence reads THE CAT ATE THE BIG RAT, what type of mutation would change the sequence to THE CAT ATA ETH EBI GRA T?

Correct AnswerverifiedShow Answer

A screening system called the _____ test is used for detecting chemicals with carcinogenic potential.

Correct AnswerverifiedShow Answer

Among the microorganisms, various genomes can include

Correct AnswerverifiedShow Answer

The transfer of DNA fragments from a dead cell to a live, competent recipient cell that results in a changed recipient cell is

Correct AnswerverifiedShow Answer

A mutation that changes a normal codon to a stop codon is called a

Correct AnswerverifiedShow Answer

The antiparallel arrangement within DNA molecules refers to

Correct AnswerverifiedShow Answer

Gene regulation can involve a protein repressor that blocks _____ from initiating transcription.

Correct AnswerverifiedShow Answer

The DNA of microorganisms is made up of subunits called

Correct AnswerverifiedShow Answer

Hfr transfer involves all of the following except

Correct AnswerverifiedShow Answer

Bacterial conjugation involves

Correct AnswerverifiedShow Answer

The process in which mutations are removed and the correct bases added is called

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which is incorrect about purines?

Correct AnswerverifiedShow Answer

Transcription occurs in the nucleus or at the nucleoid.

Correct AnswerverifiedShow Answer

Each nucleotide is composed of

Correct AnswerverifiedShow Answer

Semiconservative replication refers to

Correct AnswerverifiedShow Answer

All of the following pertain to nitrogenous bases except

Correct AnswerverifiedShow Answer

All of the following pertain to transcription except

Correct AnswerverifiedShow Answer

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