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DNA Structure and Replication

DNA Structure and Replication
After one replication in 15N, how many bands should be observed in a cesium chloride gradient?

A smear
Three
Two
One

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DNA Structure and Replication
What is the approximate size (in kb) of the E. coli genome?

5500 kilobase
4500 kilobase
6500 kilobase
3000 kilobase

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DNA Structure and Replication
Which of these drugs bind to DNA and cuts it, producing hydroxyl radicals?

All of these
Tunicamycin
Bleomycin
Erythromycin

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DNA Structure and Replication
What is the name given to the points at which a DNA helix is unwound and new strands develop?

Replication forks
Replication origins
Okazaki fragments
Leading strands

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DNA Structure and Replication
DNAs when charged, migrate in a gel towards the

positive pole
will not migrate
negative pole
none of these

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

dispersive replication
conservative replication
semi-conservative replication
Cri du Chat

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