Biochemistry A common feature of all serine proteases is A Autocatalytic activation of zymogen precursor B Tight binding of pancreatic trypsin inhibitor C Cleavage of protein on the carboxyl site of serine residues D Presence of Ser-His-Asp catalytic triad at the active site 💡 Explanation A common feature of all serine proteases is ✓ Correct Answer: D. Presence of Ser-His-Asp catalytic triad at the active site