Question

Dietary fibers are composed of
A. Cellulose
B. Amylase
C. Proteins
D. Unsaturated fats

Answer 1

All the above-listed options are different types of proteins and fats that are present in plants and animals. Dietary fibers are part of plant-derived food that cannot be digested or broken down by the human digestive system. In addition to it, dietary fibers are also called roughage.

Complete step by step answer: Dietary fibers are also called roughage. It mainly consists of two components: soluble fiber and insoluble fiber. Soluble fibers are the one which dissolves in water. It is generally fermented into gases and physiologically active by-products in the colon of the alimentary canal. Fermentable fibers are also called prebiotic fibers. Beta-glucan is an example of soluble fibers which includes oats, barley, and mushrooms, and raw guar gum. Insoluble fibers are the one which does not dissolve into water. These fibers are inert to digestive enzymes in the upper part of the gastrointestinal tract. Wheat bran, cellulose, and lignin are examples of insoluble fibers. Plant components such as cellulose, resistant starch, resistant dextrin’s inulin, lignin, chitins, pectin, beta-glucans, and oligosaccharides are non-starch polysaccharides which form the dietary fibers.
Thus, cellulose is the correct answer as non-starch polysaccharides such as cellulose, dextrin, inulin, lignin, beta-glucans, and waxes are the components of the dietary fibers.
Hence, the correct answer is option A

Note: Consumption of dietary fiber and whole grain decreases the risk of death and lower rates of coronary heart disease, colon cancer, and type 2 diabetes. Amylase is an enzyme found in saliva which converts starch into sugars.