1. The main chemical constituent of protoplasm is water. It contains 70-90% water.
2. Dry protoplasm contains 45% proteins, 25% lipids, 25% carbohydrates and 5% other substances.
3. The main organic constituents of protoplasm are proteins and nitrogenous compounds.
4. It contains small amounts of liquid fats and oils.
5. Its minerals are calcium, magnesium, potassium, sodium, iron etc.