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?

The many different amino acid R groups on proteins confer many different shapes.
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.

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

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

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