Tag: Water

In this topic, we study about air, its pollutants, oxygen, hydrogen, water and more environmental issues and facts.

A DNA molecule is made up of long chains of nucleotides, formed into two strands. A nucleotide is a 5-carbon sugar molecule joined to a phosphate group (–PO3) and an organic base. In DNA the sugar is deoxyribose and the organic base is either adenine (A), thymine (T), cytosine (C) or guanine (G).

The chemical elements that make up carbohydrates, fats and proteins. The sub-units that make up biological molecules Food tests for starch, reducing sugars, proteins, fats and oils, vitamin C. The role of water is of a solvent.