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Physical properties of protoplasm

TYPES : Gel - semisolid state

Sol - liquid state

Protoplasm - translucent (semi transparent), odourless, polyphasic fluid

viscosity - 2 to 20 centipoises

Refractive index - 1.4

pH - 6.8, contains 90% water

3 main phenomenon - Brownian movement, amoeboid movement, cyclosis

elements - 34 elements are present , but 13 elements are universal element

Electricity - neither good nor bad conductor

cohesiveness - particles are joined by vander waal's bond (hold long chain of molecules together

Surface tension - protein and lipids have less surface tension & NaCl have high surface tension

Physical Properties of Protoplasm :

1. Phase Reversal : Due to difference in temperature outer part is gel and inner part is sol.

2.Tyndall Effect : As protoplasm is colloidal in nature it exhibits Tyndall effect.

3. Surface Tension : Protoplasm being fluid in nature has surface tension.

4. Elasticity and Contractility : It is due to folding and unfolding nature of proteins.

5.Viscosity : The protoplasm has a viscosity of 2-25 centipose

6. pH : Protoplasmic pH is around 6-8.

7. Refractive Index : Protoplasm has a refractive index of 1.4

8. Protoplasm coagulates at 60°C and on reacting with acid and base.

These are all the physical properties of protoplasm.