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DNA Structure and Replication

DNA Structure and Replication
Which enzyme catalyzes the elongation of DNA molecules?

DNA polymerase
Helicase
Primase
DNA ligase

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DNA Structure and Replication
The replication of a linear DNA molecule in a eukaryotic chromosome creates a problem which is reported to be sorted out by

None of these
using enzyme called telomerase
using RNA as a template
shortening of the double stranded replicated portion

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DNA Structure and Replication
How does ethidium bromide interact with DNA?

It does not interact
It binds to phosphate
It binds to adenine
It intercalates between bases

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DNA Structure and Replication
An RNA primer is synthesized by

DNA helicases
primase
DNA topoisomerase
ligase

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DNA Structure and Replication
Automated DNA sequencing uses the chain termination method

but with a polynucleotide primer labeled with a fluorescent dye
either (b) or (c)
but with an oligonucleotide primer labeled with a fluorescent dye
with no primer

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DNA Structure and Replication
DNA helicase is used to

break a phosphodiester bond in DNA strand
None of these
unwind the double helix
interact the double helix closely

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