system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
All enzymes are not proteins. This statement is justified by
assistant
The correct answer is  Ribozymes are RNA molecules with catalytic activities, which acts upon phosphodiester bonds in RNA & cause its hydrolysis . RNAs are not protein but meet all the classic criteria of the enzyme, therefore, all enzymes are not protein.