Enzymes; Biochemistry questions - need help!!!!

[Chanel Nut]

Q: Enzymes are classified into six major groups according to the type of reaction they catalyse:

What class of enzyme is phenylalanine hydroxylase?

What general type of reactions does this class of enzyme catalyse?

How does the enzyme phenylalanine hydroxylase generate tyrosine?

[BabcockHall]

Why don't you give your thinking on this problem? I would start by writing the balanced equation. Here is one hint: I often find it helpful to assign oxidation numbers to carbon atoms. The oxidation number of any carbon atom may be defined as the number of bonds to oxygen or nitrogen minus the number of bonds to hydrogen.