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
True about ribozymes are A/E 
Select and explain. 
A. Catalytic activity, B. Involved in transesterification, C. Hammerhead metallo enzyme, D. Deamination
D: Deamination
Answer: D: Deamination 
Explanation: D i.e. DeaminationRibozyme is RNA with catalytic activityQ. Examples include selfsplicing group I introns, RNase P, & hammerhead metallo enzymeQ of virusoids (requiring Mg2+). These are involved in transesterification, phosphodiester bond hydrolysis (cleavage), RNA metabolism (splicing & endoribonuclease), peptide bond formation (peptidyl transferases) and site specific RNA cleavage.