Carbohydrate digestion ends with which simple sugar?

Carbohydrate digestion ends with which simple sugar?

• A. Fructose
• B. Glucose
• C. Galactose
• D. Sucrose

Answer: (B)

Glucose is the end product most readily used by the body's cells after carbohydrate digestion. Digestion breaks polysaccharides into disaccharides and then into monosaccharides. The brush-border enzymes convert these into glucose, galactose, and fructose. Glucose is immediately usable in glycolysis by many tissues, so it’s the primary monosaccharide supplied to the bloodstream. Galactose and fructose are absorbed but must be transported to the liver and converted into glycolytic intermediates or glucose before they can be used for energy. Therefore, the simple sugar at the end of digestion that feeds most cells directly is glucose.

Glucose is the end product most readily used by the body's cells after carbohydrate digestion. Digestion breaks polysaccharides into disaccharides and then into monosaccharides. The brush-border enzymes convert these into glucose, galactose, and fructose. Glucose is immediately usable in glycolysis by many tissues, so it’s the primary monosaccharide supplied to the bloodstream. Galactose and fructose are absorbed but must be transported to the liver and converted into glycolytic intermediates or glucose before they can be used for energy. Therefore, the simple sugar at the end of digestion that feeds most cells directly is glucose.