(a) State the functions of water in plants and animals.
(b) List the chemical elements that form carbohydrates, proteins and fats.
(c) Describe and carry out tests for (i) starch using Iodine test, (ii) reducing sugars using Benedict's test, (iii) protein using Biuret test and (iv) fats using Ethanol-Emulsion test.
(d) State the basic units of large molecules, e.g.
· glycogen which is made up of glucose as its basic units.
· polypeptides and proteins which is made up of amino acids as their basic units.
· lipids such as fats which are made of a glycerol and three fatty acids molecules.