Question 1

The following pertain to ribosomes during protein synthesis except

Accepted Answer

A)  they contain codons within their rRNA molecules.
B)  ribosomes participate only in translation.
C)  ribosomes bind to the 5'end of mRNA by their small subunit.
D)  ribosomes use their large subunit to supply enzymes for peptide bonding.
E)  ribosomes shift toward the 3'end of the mRNA strand from one codon to the next.F) A) and B)
G) B) and E)

Question 2

RNA polymerase binds to the

Accepted Answer

A)  start codon.
B)  termination sequence.
C)  regulation sequence.
D)  promoter sequence.E) B) and D)
F) A) and D)

Question 3

DNA polymerase III

Accepted Answer

A)  synthesizes primer.
B)  removes primer.
C)  joins Okazaki fragments.
D)  unzips the DNA helix.
E)  proofreads new DNA.F) A) and E)
G) C) and D)

Question 4

Some RNA viruses direct the synthesis of double-stranded DNA at some point in their life cycle.

Accepted Answer

A) True 
 B)False

Question 5

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

Accepted Answer

A)  chromosome
B)  plasmid
C)  prophage
D)  genome
E)  proteomeF) A) and E)
G) A) and D)

Question 6

Repressible operons are normally turned on in the cell.

Accepted Answer

A) True 
 B)False

Question 7

A bacteriophage transfers 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)  creation of an Hfr cell.E) A) and D)
F) A) and C)

Question 8

A primer of ____ is needed at the origin of nucleotide addition.

Accepted Answer

A)  polymerase III
B)  polymerase I
C)  helicase
D)  RNA
E)  DNAF) A) and B)
G) A) and E)

Question 9

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) A) and D)
G) B) and D)

Question 10

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)  All of these choices are correct.F) A) and B)
G) None of the above

Question 11

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) B) and D)
F) B) and C)

Question 12

Which of the following is not true of an organism's genotype?

Accepted Answer

A)  The genotype is inherited.
B)  The genotype is made up of structural genes coding for proteins.
C)  The genotype includes genes coding for RNA.
D)  The genotype includes regulatory genes controlling gene expression.
E)  The genotype includes the expressed traits governed by the genes.F) A) and C)
G) B) and D)

Question 13

The expression of genetic traits is the

Accepted Answer

A)  genome.
B)  genotype.
C)  proteome.
D)  phenotype.
E)  proteotype.F) A) and B)
G) A) and C)

Question 14

During replication, each parent DNA strand serves as a _____ for synthesis of new DNA strands.

Accepted Answer

A)  copy point
B)  template
C)  comparison molecule
D)  scaffold
E)  reservoirF) A) and C)
G) D) and E)

Question 15

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 synthesis.F) All of the above
G) B) and C)

Question 16

Among the microorganisms, various genomes can include

Accepted Answer

A)  chromosomes.
B)  plasmids.
C)  mitochondrial DNA.
D)  chloroplast DNA.
E)  All of these choices are correct.F) A) and C)
G) A) and B)

Question 17

Split genes

Accepted Answer

A)  are common in prokaryotes and eukaryotes.
B)  only have exons initially transcribed to mRNA.
C)  have introns located only at the beginning and end of a coding region.
D)  require spliceosomes to excise introns and then join exons.
E)  All of these choices are correct.F) B) and E)
G) B) and D)

Question 18

Full induction of the lactose operon requires

Accepted Answer

A)  that lactose be present.
B)  that lactose and glucose both be present.
C)  that lactose be present without glucose.
D)  that lactose and arabinose both be present.
E)  All of these choices induce the lactose operon.F) A) and D)
G) None of the above

Question 19

Which is incorrect about purines?

Accepted Answer

A)  Purines are only found in DNA, not in RNA.
B)  Purines are nitrogenous bases.
C)  Purines are always paired with a specific pyrimidine.
D)  Purines include adenine and guanine.
E)  Purines are found within nucleotides.F) B) and D)
G) B) and E)

Question 20

All mutations are harmful to the cell.

Accepted Answer

A) True 
 B)False

Exam 9: Microbial Genetics

Semiconservative replication refers to

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The expression of genetic traits is the

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RNA polymerase binds to the

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Which of the following is not true of an organism's genotype?

Correct AnswerverifiedShow Answer

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

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DNA polymerase III

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Which is incorrect about purines?

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Some RNA viruses direct the synthesis of double-stranded DNA at some point in their life cycle.

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All of the following pertain to transcription except

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All mutations are harmful to the cell.

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

Correct AnswerverifiedShow Answer

A primer of ____ is needed at the origin of nucleotide addition.

Correct AnswerverifiedShow Answer

Full induction of the lactose operon requires

Correct AnswerverifiedShow Answer

The following pertain to ribosomes during protein synthesis except

Correct AnswerverifiedShow Answer

DNA polymerase III

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Repressible operons are normally turned on in the cell.

Correct AnswerverifiedShow Answer

During replication, each parent DNA strand serves as a _____ for synthesis of new DNA strands.

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Split genes

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

Correct AnswerverifiedShow Answer

Among the microorganisms, various genomes can include

Correct AnswerverifiedShow Answer

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