DNA Structure and Replication
DNA replication results in

two completely new DNA molecules
one new molecule of RNA
one new DNA molecules 1 old molecule
two DNA molecules such that each one contains a strand of the original

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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?

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.
DNA has one main function in cells whereas proteins have many.
All of these

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