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Pre-messenger RNA molecules contain both __________ and exons. (Be sure your answer is plural.)

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The process of __________ is described as semiconservative.


A) translation
B) transcription
C) mismatch repair
D) transformation
E) DNA replication

F) All of the above
G) A) and E)

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The phenotype of an organism reflects only part of its genotype.

A) True
B) False

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Describe the various types of nucleic acids that are typically found in cells.

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All cells possess one or more DNA molecu...

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The AUG codon functions in coding for the amino acid methionine and as a


A) termination signal.
B) start signal.
C) "wobble" codon.
D) marker for introns.
E) recognition site for RNA polymerase.

F) A) and D)
G) A) and C)

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A(n) __________ is a specific sequence of nucleotides that codes for a protein or an RNA molecule.

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Which of the following is a DNA repair enzyme activated by visible light?


A) transposase
B) DNA photolyase
C) bacteriocin
D) DNA ligase
E) primase

F) B) and E)
G) A) and E)

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


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

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

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Most bacteria have a natural ability to take up DNA from their environment.

A) True
B) False

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Which of the following is a characteristic shared by DNA and RNA polymerases?


A) efficiency of proofreading
B) type of nucleotides used
C) direction of polymerization
D) speed
E) dependence on helicase

F) B) and E)
G) A) and D)

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Which of the following causes mutations by creating thymine dimers?


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

F) D) and E)
G) A) and B)

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Which of the following is found at the 5 end of a DNA strand?


A) a phosphate group
B) a hydrogen bond
C) a hydroxyl group
D) histones
E) a methyl group

F) B) and C)
G) A) and E)

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All of the following are associated with nucleic acid structure EXCEPT


A) ribose.
B) hydrogen bonds.
C) uracil.
D) ionic bonds.
E) phosphate.

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

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Initiation of __________ involves Sigma factor molecules.


A) DNA replication
B) translation
C) transcription
D) splicing
E) termination

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

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The __________ is the set of genes in the genome of an organism.

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