Question 1

The phenotype of an organism is its set of (genes/traits/chromosomes).

Accepted Answer

The answer of The phenotype of an organism is its...

Question 2

Which of the following is NOT a characteristic of both DNA and RNA polymerases?

Accepted Answer

A)   directionality of synthesis
B)   energy is provided by pyrophosphate
C)   hydrogen bonding of complementary nucleotides
D)   requirement for an initiation signal
E)   requirement for a primer

Question 3

Typical eukaryotic genomes are composed of ________ chromosomes.

Accepted Answer

A)   multiple linear
B)   multiple circular
C)   a single circular
D)   a single linear
E)   both linear and circular

Question 4

DNA, which is negatively charged, wraps around positively charged histones as part of the packaging of eukaryotic chromosomes.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following types of plasmids allows a bacterial cell to kill its competitors?

Accepted Answer

A)   virulence plasmids
B)   fertility plasmids
C)   bacteriocin plasmids
D)   resistance plasmids
E)   cryptic plasmids

Question 6

Which of the following is NOT a characteristic of Okazaki fragments?

Accepted Answer

A)   They are checked for accuracy by DNA polymerase III.
B)   They make up the lagging strand of replicated DNA.
C)   They begin with an RNA primer.
D)   They are joined together by DNA ligase.
E)   They are longer in eukaryotic cells.

Question 7

Which of the following is involved in translation?

Accepted Answer

A)   rRNA only
B)   tRNA only
C)   mRNA only
D)   both mRNA and tRNA
E)   mRNA, rRNA, and tRNA are all involved.

Question 8

The horizontal transfer process known as transduction

Accepted Answer

A)   involves a virus.
B)   requires a pilus.
C)   requires a cell to be "competent."
D)   requires a plasmid.
E)   involves a mutagen.

Question 9

During elongation, a charged tRNA first enters the ribosomal ________ site and then moves into the ________ site.

Accepted Answer

A)   A; E
B)   P; A
C)   P; E
D)   A; P
E)   E; A

Question 10

The chemical 5-bromouracil mimics the chemical structure of thymine, making it a(n) (analog/nucleotide/precursor) of thymine.

Accepted Answer

The answer of The chemical 5-bromouracil mimics the chemical structure...

Question 11

Nucleotide analogs cause frameshift mutations.

Accepted Answer

A) True 
 B)False

Question 12

The (leading/lagging/replicating) strand is the DNA strand that is synthesized continuously during DNA replication.

Accepted Answer

The answer of The (leading/lagging/replicating) strand is the DNA strand...

Question 13

Frederick Griffith discovered

Accepted Answer

A)   transformation.
B)   transposons.
C)   the lac operon.
D)   DNA.
E)   conjugation.

Question 14

Which of the following causes mutations by creating thymine dimers?

Accepted Answer

A)   nucleotide analogs
B)   nitrous acid
C)   ultraviolet light
D)   benzopyrene
E)   gamma rays

Question 15

Amino acids are delivered in their appropriate order by

Accepted Answer

A)   mRNAs.
B)   RNA-induced silencing complexes (RIS
C)  .
C)   ribozymes.
D)   rRNAs.
E)   tRNAs.

Question 16

A chemical is reported to inhibit bacterial replication. Bacterial cells are placed in medium with all nutrients necessary for replication. The chemical is added to the culture, and after a half hour an extract of the DNA is prepared. A significant percentage of the DNA is in pieces about 1000 to 2000 bases in length. The results are consistent with the chemical blocking the function of DNA ligase.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following DNA repair processes is most likely to introduce mutations into the repaired DNA?

Accepted Answer

A)   base-excision repair
B)   light repair
C)   single-strand repair
D)   mismatch repair
E)   SOS response repair

Question 18

The Ames test demonstrates that a chemical is

Accepted Answer

A)   carcinogenic.
B)   carcinogenic in Salmonella.
C)   mutagenic in Salmonella.
D)   carcinogenic in humans.
E)   mutagenic in humans.

Question 19

Prokaryotic operons typically include a(n)  ________ and a(n)  ________ with multiple genes.

Accepted Answer

A)   operator; terminator
B)   operator; promoter
C)   promoter; repressor
D)   inducer; repressor
E)   CAP-binding site; inducer

Question 20

A bacterial genome is typically

Accepted Answer

A)   a single linear piece of DNA.
B)   multiple linear pieces of DNA.
C)   a linear RNA molecule.
D)   a single circular DNA molecule.
E)   multiple circular DNA molecules.

Exam 7: Microbial Genetics

Typical eukaryotic genomes are composed of ________ chromosomes.

Correct Answer
verified

Correct Answer
verified

During elongation, a charged tRNA first enters the ribosomal site and then moves into the site.

Correct Answer
verified

Which of the following is NOT a characteristic of both DNA and RNA polymerases?

Correct Answer
verified

The phenotype of an organism is its set of (genes/traits/chromosomes).

Correct Answer
verified

Which of the following types of plasmids allows a bacterial cell to kill its competitors?

Correct Answer
verified

The Ames test demonstrates that a chemical is

Correct Answer
verified

The (leading/lagging/replicating) strand is the DNA strand that is synthesized continuously during DNA replication.

Correct Answer
verified

The chemical 5-bromouracil mimics the chemical structure of thymine, making it a(n) (analog/nucleotide/precursor) of thymine.

Correct Answer
verified

DNA, which is negatively charged, wraps around positively charged histones as part of the packaging of eukaryotic chromosomes.

Correct Answer
verified

Prokaryotic operons typically include a(n) and a(n) with multiple genes.

Correct Answer
verified

Which of the following is involved in translation?

Correct Answer
verified

The horizontal transfer process known as transduction

Correct Answer
verified

Amino acids are delivered in their appropriate order by

Correct Answer
verified

Nucleotide analogs cause frameshift mutations.

Correct Answer
verified

Frederick Griffith discovered

Correct Answer
verified

Which of the following is NOT a characteristic of Okazaki fragments?

Correct Answer
verified

Which of the following causes mutations by creating thymine dimers?

Correct Answer
verified

Which of the following DNA repair processes is most likely to introduce mutations into the repaired DNA?

Correct Answer
verified

A bacterial genome is typically

Correct Answer
verified

Exam 7: Microbial Genetics

Typical eukaryotic genomes are composed of ________ chromosomes.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

During elongation, a charged tRNA first enters the ribosomal ________ site and then moves into the ________ site.

Correct AnswerverifiedShow Answer

Which of the following is NOT a characteristic of both DNA and RNA polymerases?

Correct AnswerverifiedShow Answer

The phenotype of an organism is its set of (genes/traits/chromosomes).

Correct AnswerverifiedShow Answer

Which of the following types of plasmids allows a bacterial cell to kill its competitors?

Correct AnswerverifiedShow Answer

The Ames test demonstrates that a chemical is

Correct AnswerverifiedShow Answer

The (leading/lagging/replicating) strand is the DNA strand that is synthesized continuously during DNA replication.

Correct AnswerverifiedShow Answer

The chemical 5-bromouracil mimics the chemical structure of thymine, making it a(n) (analog/nucleotide/precursor) of thymine.

Correct AnswerverifiedShow Answer

DNA, which is negatively charged, wraps around positively charged histones as part of the packaging of eukaryotic chromosomes.

Correct AnswerverifiedShow Answer

Prokaryotic operons typically include a(n) ________ and a(n) ________ with multiple genes.

Correct AnswerverifiedShow Answer

Which of the following is involved in translation?

Correct AnswerverifiedShow Answer

The horizontal transfer process known as transduction

Correct AnswerverifiedShow Answer

Amino acids are delivered in their appropriate order by

Correct AnswerverifiedShow Answer

Nucleotide analogs cause frameshift mutations.

Correct AnswerverifiedShow Answer

Frederick Griffith discovered

Correct AnswerverifiedShow Answer

Which of the following is NOT a characteristic of Okazaki fragments?

Correct AnswerverifiedShow Answer

Which of the following causes mutations by creating thymine dimers?

Correct AnswerverifiedShow Answer

Which of the following DNA repair processes is most likely to introduce mutations into the repaired DNA?

Correct AnswerverifiedShow Answer

A bacterial genome is typically

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

During elongation, a charged tRNA first enters the ribosomal site and then moves into the site.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Prokaryotic operons typically include a(n) and a(n) with multiple genes.

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