Which of the following located in the active site of the enz

Which of the following located in the active site of the enzyme chymotrypsin participates in acid-base chemistry?

A:Histidine

B:The amide group of glycine

C:The hydrophobic pocket

D:The amide group of serine

E:The side chain oxygen of serine

-An explanation would be great!

Ans: D: tha amide group of serine.

In chymotrypsin mechanism.