Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'methionyl-tRNA formyltransferase activity'?

A. Catalysis of the reaction: S-adenosyl-L-methionine + 4-demethylwyosine37 in tRNAPhe = 5'-S-methyl-5'-thioadenosine + H+ + 7-[(3S)-3-amino-3-carboxypropyl]-4-demethylwyosine37 in tRNAPhe.
B. Catalysis of the reaction: tRNA(n+1) + phosphate = tRNA(n) + a nucleoside diphosphate.
C. Catalysis of the reaction: 10-formyltetrahydrofolate + L-methionyl-tRNA + H2O = tetrahydrofolate + N-formylmethionyl-tRNA.
D. Catalysis of the reaction: 2'-phospho-[ligated tRNA] + NAD+ = mature tRNA + ADP ribose 1'',2''-phosphate + nicotinamide + H2O. This reaction is the transfer of the splice junction 2-phosphate from ligated tRNA to NAD+ to produce ADP-ribose 1'-2' cyclic phosphate.

Answer: Catalysis of the reaction: 10-formyltetrahydrofolate + L-methionyl-tRNA + H2O = tetrahydrofolate + N-formylmethionyl-tRNA.