This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Enzymes, Subject name: Biochemistry
Peptidyl transferase is a/an 
Select and explain. 
A. Enzyme, B. Catalyst, C. Ribozyme, D. Elongation factor
C: Ribozyme
Answer: C: Ribozyme 
Explanation: The Peptidyl transferase is an aminoacyltransferase (EC 2.3.2.12) as well as the primary enzymatic function of the ribosome, which forms peptide bonds between adjacent amino acids using tRNAs during the translation process of protein biosynthesis.