ANATOMY

Detailed explanation-1: -Starch digestion involves the breakdown by -amylase to small linear and branched malto-oligosaccharides, which are in turn hydrolyzed to glucose by the mucosal -glucosidases, maltase-glucoamylase (MGAM) and sucrase-isomaltase (SI).

Detailed explanation-2: -It occurs in plants in the form of granules, and these are particularly abundant in seeds (especially the cereal grains) and tubers, where they serve as a storage form of carbohydrates. The breakdown of starch to glucose nourishes the plant during periods of reduced photosynthetic activity.

Detailed explanation-3: -During digestion, starches and sugars are broken down both mechanically (e.g. through chewing) and chemically (e.g. by enzymes) into the single units glucose, fructose, and/or galactose, which are absorbed into the blood stream and transported for use as energy throughout the body.

Detailed explanation-4: -The digestion of starch begins with the action of amylase enzymes secreted in the saliva and small intestine, which convert it to maltotriose, maltose, limit dextrins, and some glucose.

Detailed explanation-5: -decomposition reaction. Decomposition reactions are characterized by a larger molecule (e.g. starch) being broken down into smaller molecules (e.g. glucose) as a catabolic reaction.