Which compound is known as a non-starch polysaccharide that is resistant to hydrolysis?

Cellulose is recognized as a non-starch polysaccharide that is resistant to hydrolysis. This means it cannot be easily broken down by the digestive enzymes present in the human body, making it a key component of dietary fiber. Found in the cell walls of plants, cellulose has a unique structure that allows it to provide bulk to the diet, aiding in digestive health and promoting regular bowel movements.

Its resistance to hydrolysis distinguishes it from other carbohydrates. While amylopectin is a starch that can be broken down into glucose, cellulose is not available for energy in the same way due to its complex bonds. Fructose, a simple sugar, does not fall under the category of polysaccharides, and soluble fiber, although a type of dietary fiber, can be partially hydrolyzed or fermented by gut bacteria. Therefore, cellulose is specifically noted for its non-digestible nature, making it the correct answer in this context.