This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Carbohydrates, Subject name: Biochemistry
Starch is a: 
Select and explain. 
A. Polysaccharide, B. Disaccharide, C. Protein, D. None of these
A: Polysaccharide
Answer: A: Polysaccharide 
Explanation: Ans. A. PolysaccharideStarch is a homo polysaccharide composed of D- glucose units held together by a-glycosidic bonds, (a 1-- 4 linkages; at branching points a 1 -- 6 linkages). It is also known as a glucosan. Hydrolyzed by enzyme amylase. It has two forms: a- amylase present in saliva and pancreatic juice. b-amylase present in sprouted grains and malts.