GLP - 1 is broken down by: (A) α - glucosidase, (B) Rasburicase, (C) Dipeptidyl peptidase, (D) Glucose 1 phosphatase
Answer is C. GLP - 1 is a peptide hormone released from intestinal cells that act on β -  cells to release insulin. It is rapidly broken down by Dipeptidyl peptidase 4 (DPP - 4).