1. Phosphatases identify substrates by
a) the 3-dimensionalstructure of the protein.
b) specific aminoacids adjacent to the site.
c) specific tyrosineresidues
d) specific aminoacids downstream of the site.
2. Phosphorylation of substrates for protein kinases are found
a) only in thenucleus.
b) only in thecytoplasm.
c) only in the nucleusand cytoplasm.
d) everywhere in the cell