Which one of the following is NOT a simple protein
ACasein
BCollagen
CGluten
DKeratin
Answer:
A. Casein
Read Explanation:
casein is a complex protein. It's a complete protein, meaning it contains all the essential amino acids the body needs for growth and repair. Casein is a milk protein that's produced by mammals. It's found in the milk of all mammals, but human breast milk is 40% casein and cow's milk is 80% casein.
