BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Cellulose is the primary structural molecule in plant and algae cell walls. Since human digestive enzymes cannot break down the glycosidic linkages in cellulose, humans are unable to digest it.

Detailed explanation-2: -Fiber is a type of carbohydrate that the body can’t digest. Though most carbohydrates are broken down into sugar molecules called glucose, fiber cannot be broken down into sugar molecules, and instead it passes through the body undigested.

Detailed explanation-3: -Humans cannot digest cellulose.

Detailed explanation-4: -Cellulose cannot be directly utilised by the human body as a source of energy. Humans are unable to digest cellulose because the appropriate enzymes to breakdown the beta acetal linkages are lacking.No vertebrate can digest cellulose directly.

Detailed explanation-5: -Cellulose, as is starch, is a carbohydrate. It is a structural polysaccharide, while starch is one of the storage polysaccharides. In terms of quantity, cellulose is the most represented polymer on Earth and is the main support for trees and other plants (cotton, flax, jute, sugarcane, cereals, etc.).