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

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

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DNA Structure and Replication
In DNA, there are

only two bases known as adenine and cytosine
four bases known as adenine, guanine, thymine and cytosine
five bases known as adenine, guanine, thymine, tryptophan and cytosine
three bases known as adenine, guanine and cytosine

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