Water - Biomolecules

Water

Water is the most abundant component in living organisms. Life on earth is inevitably linked to water. Water makes up 70% of human cell and upto 95% of mass of a plant cell (Figure 8.2).

1. Chemistry of Water

Water is a tiny polar molecule and can readily pass through membranes. Two electronegative atoms of oxygen share a hydrogen bonds of two water molecule. Thus, they can stick together by cohesion and results in lattice formation (Figure 8.4).

2. Properties of Water

•            Adhesion and cohesion property

•            High latent heat of vaporisation

•            High melting and boiling point

•            Universal solvent

•            Specific heat capacity