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

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

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DNA Structure and Replication
The higher order structure of DNA shows symmetry, whereas the higher order structures of most proteins do not. Why isn't protein shape more regular like DNA?

Some S amino acids cause proteins to bend; others cause protein to flatten.
All of these
DNA has one main function in cells whereas proteins have many.
The many different amino acid R groups on proteins confer many different shapes.

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DNA Structure and Replication
In a typical electrophoresis experiment, larger fragments of DNA move more

slowly, so they appear nearer the top of a gel photograph
slowly, so they appear nearer the bottom of a gel photograph
quickly, so they appear nearer the bottom of a gel photograph
quickly, so they appear nearer the top of a gel photograph

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