The function of aminoacyl-trna synthetases is to
a. transcribe trna genes
b. match trna anticodons and mrna codons at the ribosome
c. attach amino acids to trnas
d. form the peptide bonds between amino acids at the ribosome

Option c. Attach amino acids to tRNAs

Explanation:

The aminoacylation is the process of charging a tRNA molecule. The reaction is catalyzed by enzymes called AARSs (Aminoacyl-tRNA synthetases).

The reaction occurs during the process of translation. The first step is involved in using a ATP molecule amino acid activation, thus forming AARSs-aminoacyl adenylate complex. The amino acid (active) is transferred to tRNA in the second step of aminoacylation process. Thus, the function of aminoacyl-tRNA synthetases is to attach amino acids to tRNAs