How can you say that the starch digest in stomach?
Answers
Explanation:
Both maltose and dextrin are digested by enzymes (maltase) which are fixed to the epithelial lining of the small intestine.
The hydrolysis of maltose / dextrin results in the formation of glucose monomers.
Answer:
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Explanation:
Starch is a polysaccharide composed of glucose monomers and accounts for ~ 60% of the carbohydrates consumed by humans
Starch can exist in one of two forms – linear chains (amylose) or branched chains (amylopectin)
The digestion of starch is initiated by salivary amylase in the mouth and continued by pancreatic amylase in the intestines
Starch digestion by amylase does not occur in the stomach as the pH is unsuitable for amylase activity (optimal pH ~ 7)
Amylase digests amylose into maltose subunits (disaccharide) and digests amylopectin into branched chains called dextrins
Both maltose and dextrin are digested by enzymes (maltase) which are fixed to the epithelial lining of the small intestine
The hydrolysis of maltose / dextrin results in the formation of glucose monomers
Glucose can be hydrolysed to produce ATP (cell respiration) or stored in animals as the polysaccharide glycogen
Glucose monomers can also be generated from the breakdown of other disaccharides (such as lactose and sucrose)