Discuss in detail about the physical properties of protoplasm.

Explanation

1. Protoplasm I translucent , odourless and polyphasic fluid.
2. It is a crystal colloid solution which is a mixture of chemical substances forming crystalloid i.e., true solutiong (sugars, salts, acids, bases) and others forming colloidal solution (Proteins and lipids).
3. The pH of the protoplasm around 6.8,contain 90% water (10% in dormant seeds).
4. Protoplasm is neither a good nor a bad conductor of elecricity. it forms a delimiting membrane on coming in contact with water and solidifiles when heated.
5. Cohesiveness : Particles or molecules of protoplasm are adhered with each other by forces, such as Van der waal 's bonds, that hold long chains of molecules together. this property varies with the strength of these forces.
6. Contractillity. : The contractillity of protoplasm is important for the absorption and removal of water especially stomatal operations.
7. Surface tension : The proteins and lipids of the protoplasm have less surface tension , hence they are found at the surface forming the membrane. On the other hand the chemical substances (NaCl) have high surface tension , so they occur in deeper parts of the cell protoplasm.