This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
Most peptide and protein hormones are synthesized as 
Select and explain. 
A. A secretagogue, B. A pleiotropic hormone, C. Proopiomelanocoin (POMC), D. A preprohormone
D: A preprohormone
Answer: D: A preprohormone 
Explanation: Preprohormones are the gene products for most peptide and protein hormones. These are rapidly cleaved to form prohormones. POMC and propressophysin are two examples of specific prohormones.Ref: Guyton; 13th edition