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DNA Structure and Replication

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

Helicase
DNA ligase
Primase
DNA polymerase

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DNA Structure and Replication
The melting of 40-45 bp at the oriC site of E. coli requires

DNA + ATP + HU
DNA+ ATP + HU + DNAb + DNAa
DNA + ATP + HU + DNAb
DNA + ATP + HU + DNAb + DNAa + Pol III holoenzyme

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DNA Structure and Replication
First evident that DNA is genetic material comes from the experiment of Griffith is

transduction
replication
translation
transformation

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DNA Structure and Replication
Klenow fragment without free nucleotides exhibits

nickase activity
exonuclease activity
no activity
endonuclease activity

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DNA Structure and Replication
Which of the following are short nucleotides strands made by DNA polymerase working in the opposite direction of the replication fork?

Primers
Leading strands
Lagging strand
Okazaki fragments

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DNA Structure and Replication
There is a single origin for DNA replication in bacteria. How many origins of replication are found in the much larger genomes of eukaryotes such as mammals?

About 100
One
none of these
Thousands and tens of thousands

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