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1.
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DNA replication is
a. | conservative. | b. | semiconservative. |
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2.
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The circular chromosome of the bacterium E. coli has a single origin
of replication, which is
a. | an enzyme that catalyzes DNA replication. | b. | a single-stranded
section of nucleotides where DNA replication begins. | c. | a specific sequence of nucleotides where DNA
replication begins. | d. | the binding site of topoisomeras, when causes
DNA replication to begin. |
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3.
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What is the name of the enzyme that unwinds a strand of DNA when it is being
replicated?
a. | helicase | c. | primase | b. | topoisomerase | d. | DNA polymerase |
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4.
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What is the purpose of single-strand binding proteins?
a. | bind the two DNA strands back together after replication is over | b. | give the DNA
polymerase a place to start the replication process | c. | attach the primer to the DNA template
strand | d. | keep the DNA bases from pairing back together after it has been
unwound |
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5.
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DNA can only elongate in the _____ direction.
a. | 3’ ® 5’ | c. | 3’ ® 3’ | b. | 5’ ®
3’ | d. | 5’
® 5’ |
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6.
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Because of the directionality of DNA replication, one of the new synthesized
strands is actually made in pieces called
a. | Okinawa fragments. | c. | Okazaki fragments. | b. | Hirosaki fragments. | d. | Nagano
fragments. |
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7.
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Eukaryotes have telomeres so that
a. | important genes will not be lost when repeated replication causes chromosomes to
shorten. | b. | the primers necessary for DNA replication will have a place to
attach. | c. | DNA polymerase is able to proofread the newly synthesized DNA
strand. | d. | individual fragments of DNA that are produced on the lagging strand will be able to
be chemically bonded together. |
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