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DNA Structure and Replication

DNA Structure and Replication
An RNA primer is synthesized by

primase
DNA helicases
DNA topoisomerase
ligase

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

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DNA Structure and Replication
Okazaki fragments occur on the __________ and are bonded together by __________

Lagging strand, ligase
Leading strand, polymerase
mRNA, anticodons
tRNA, polymerase

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

3000 kilobase
4500 kilobase
6500 kilobase
5500 kilobase

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DNA Structure and Replication
DNA with a G-C content of 50% will melt at approximately

100 °C
90 °C
70 °C
60°C

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DNA Structure and Replication
The enzyme responsible for breaking the hydrogen bonds, and thus separating the DNA strands during DNA synthesis is

strandase
DNA polymerase
none of these
helicase

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