Carbohydrates are the biological molecules having a general emperical formula .
There are various important biological functions of carbohydrates. Carbohydrates serve as structural components, component of coenzymes, and backbone of RNA. Carbohydrates provide and store energy, and also plays important role in blood clotting, development, immune system, and preventing pathogenesis.
A pure substance that contains more than one atom is called a compound.
<u><em>Explanation:</em></u>
Compounds are formed by combination of atoms by a fixed ratio. They have their own characteristic features.
Pure substances are further broken down into elements and compounds. A compound can be destroyed by chemical means. It might be broken down into simpler compounds, into its elements or a combination of the two.
<u><em>Example </em></u>
H2SO4 which is formed by combination of three different atoms like H, S and O.