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DNA Structure and Replication

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

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

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DNA Structure and Replication
What bands will be observed in a cesium chloride gradient after two rounds of replication?

One medium and one heavy band
One medium band
One light and one medium band
One light, one medium and one heavy band

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DNA Structure and Replication
What does ligase do during replication of DNA?

Synthesizes the lagging strand
Joins nicks in DNA strands
Makes copies of mRNA from DNA
Digests mRNA when it is no longer needed

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DNA Structure and Replication
Messelsen and Stahl model of replication was called

dispersive replication
conservative replication
Cri du Chat
semi-conservative replication

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DNA Structure and Replication
Without telomerase, what would happen to the ends of chromosomes after each round of replication?

None of these
Chromosomes would become progressively shorter
Chromosomes would get longer
Nothing would happen

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DNA Structure and Replication
DNA segments capable of moving from one place in the genome to another is known as

transposons
retrovirus
introns
moving elements

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