Explain the differences and similarities between RNA
interference (RNAi) and gene regulation by micro RNAs. Give
explicit molecular details.

Consider (at least) such issues as:

a) Where does the RNA come from?

b) What is the size and structure of the RNA?

c) How is the RNA modified in the cell?

d) How does the RNA select its target gene?

e) How does the RNA affect expression of a target gene?