The only function of starch in the human diet is the conversion to glucose for energy. Starch begins to break down in the mouth, where saliva surrounds its complex molecules. Saliva breaks down starch into simpler carbohydrates called maltose. After entering the small intestine, maltose is deconstructed into an even simpler form, which passes through the intestinal walls directly into the bloodstream. It provides energy to the cell, including the brain. The specific structure of maltose causes its properties in the body. What sugar fragments does maltose have in its structure?

 two α-D glucopyranose

hemi acetyl hydroxyl group

disaccharides