Question

which group of organic nutrients are the primary energy source of all living things

Answer 1

Carbohydrates are the building material which serves as a fuel. It is classified into three major types: monosaccharide, disaccharide, and polysaccharide. Monosaccharides (like glucose and fructose) are the simple sugars or the simplest carbohydrates. These are the monomers to form complex carbohydrates. Two monosaccharides are linked by a covalent bond to form a disaccharide and further two or more disaccharides link to form a polysaccharide. Maltose, lactose, and sucrose are some common disaccharides. Polysaccharides are the polymers with many monosaccharides linked by glycosidic linkages or a macromolecule formed by the dehydration reaction of two or many disaccharides.

Carbohydrates like starch and sugar are broken down into a monosaccharide, glucose which is the principal energy source of the body. Glucose is either used as a fuel or sent to the muscles and liver where it is converted into glycogen and stored.

Glucose, an organic molecule is a simple sugar that is used as an immediate source of energy. It is the most abundant monosaccharide whose molecular formula is C6H12O6.

CHO 애 H- HOH HOMH HO CHOH

Figure: The structure of D- Glucose

Therefore, Carbohydrates are the organic nutrients that provide the energy source to all living organisms.