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: Pharmacology
GLP - 1 is broken down by 
Select and explain. 
A. α - glucosidase, B. Rasburicase, C. Dipeptidyl peptidase, D. Glucose 1 phosphatase
C: Dipeptidyl peptidase
Answer: C: Dipeptidyl peptidase 
Explanation: 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).