What happens when a formalin-preserved Spirog | vedclass

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Question

(D) Formalin is a chemical fixative used to preserve biological specimens. When a $Spirogyra$ filament is preserved in formalin,the cell membrane and

Vedclass · Accepted Answer

Nothing happens

Vedclass · Answer

(D) Formalin is a chemical fixative used to preserve biological specimens. When a $Spirogyra$ filament is preserved in formalin,the cell membrane and cytoplasm are chemically fixed and denatured,rendering the cell dead and non-functional. Osmosis and plasmolysis are physiological processes that require a living,semi-permeable membrane to occur. Since the cells are dead,they lose their selective permeability,and therefore,no osmotic movement of water occurs when placed in a hypertonic solution. Thus,nothing happens to the filament.

What happens when a formalin-preserved $Spirogyra$ filament is placed in a hypertonic sugar solution?

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