The difference between biochemical, pharmaceutical, and diagnostic chemical

What is the difference between biochemical, pharmaceutical, and diagnostic chemical reactions?
What is a specific example that exists for each and why might they be important to healthcare professionals?
List a balanced chemical equation for each and explain how it is used in your example above.
Discussion Question 2
Identify the two important classes of catalysts and describe the difference between each.
Choose a catalyst that exists in the human body. Explain its importance and how it works.
Analyze the chemical reactions that take place when a biological catalyst combines with a reactant (substrate)
to form an unstable intermediate.