Question

Man needs carbohydrates as a source of energy and gets these from-
A. Starch
B. Cellulose
C. Both A & B
D. None of the above

Answer 1

Carbohydrates as we know are a very essential part of our balanced diet. Carbohydrates are the major biomolecules that are composed of carbon, hydrogen and oxygen. In the ratio of. They are the primary energy providing biomolecules and certain organisms. They also act as building materials for making cell walls and cell membranes.

Complete answer:
Option A Starch- starch is a source of carbohydrates which are abundant in food items like- rice, wheat, barley. These cereals have carbohydrates in abundance. Human beings can easily digest these cereals and obtain energy from them.
Option A is the correct answer.
Option B Cellulose- cellulose is the main component in the plant cells which function is to make the plant stiff and upright so that the plant does not lose its firmness.
Option B is not the correct answer.
Option C Both A & B- this option includes both the option A and B which is not correct as one of the Option is wrong and other is correct, hence both options are not correct.
Option C is not the correct answer.
Option D None of the above- this option is technically not right as one of the above-mentioned options is true.
Option D is not the correct answer.

Therefore, Option A is the correct answer.

Note:
They can be categorized as Monosaccharides, disaccharides and polysaccharides. As we know, Glucose is the most common form of monosaccharide. Glucose is being used up as an energy source for the formation of starch, glycogen and cellulose is hexose. Ribose and deoxyribose are pentose sugars used in building of RNA and DNA respectively.