Which statement regarding dietary cellulose is true?

Which statement regarding dietary cellulose is true?

• A. It is absorbed from the digestive tract and converted to glucose.
• B. It is converted to protein by gluconeogenesis.
• C. It is catabolized by the liver to ketone bodies.
• D. It cannot be metabolized but provides fiber.

Answer: (D)

The statement that dietary cellulose cannot be metabolized but provides fiber is accurate due to its chemical structure and role in the human diet. Cellulose is a complex carbohydrate and a form of dietary fiber found in plant cell walls. Unlike starches and sugars, cellulose is composed of glucose units linked by beta-1,4-glycosidic bonds, which human digestive enzymes cannot break down. As a result, cellulose passes through the digestive system largely intact. While it doesn't provide calories or contribute nutrients through metabolic conversion like glucose, dietary cellulose plays a critical role in maintaining digestive health. It contributes to stool bulk, helps regulate bowel movements, and supports a healthy gut microbiome. The presence of fiber can also aid in preventing various gastrointestinal issues, such as constipation. This understanding assists individuals in appreciating the importance of dietary fiber, including cellulose, in promoting overall health despite its indigestibility.

The statement that dietary cellulose cannot be metabolized but provides fiber is accurate due to its chemical structure and role in the human diet. Cellulose is a complex carbohydrate and a form of dietary fiber found in plant cell walls. Unlike starches and sugars, cellulose is composed of glucose units linked by beta-1,4-glycosidic bonds, which human digestive enzymes cannot break down. As a result, cellulose passes through the digestive system largely intact.

While it doesn't provide calories or contribute nutrients through metabolic conversion like glucose, dietary cellulose plays a critical role in maintaining digestive health. It contributes to stool bulk, helps regulate bowel movements, and supports a healthy gut microbiome. The presence of fiber can also aid in preventing various gastrointestinal issues, such as constipation.

This understanding assists individuals in appreciating the importance of dietary fiber, including cellulose, in promoting overall health despite its indigestibility.