This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Which of the following enzymes do not participate in a ping-pong reaction? 
Select and explain. 
A. Aminotransferases, B. Serine proteases, C. Pyruvate carboxylase, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: The term “ping-pong” applies to mechanisms in which one or more products are released from the enzyme before all the substrates have been added. Ping-pong reactions involve covalent catalysis and a transient, modified form of the enzyme.
Example- aminotransferases, serine proteases and pyruvate carboxylase.
Reference- Harper 30th edition Pg- 84