The most abundant substance found in protoplasm–

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Water. The most abundant inorganic constituent of the protoplasm is the water. The entire content of a living cell is known as protoplasm. It includes the cytoplasm and the nucleus. Protoplasm is called the living substance of the cell. Water constitutes about 65 to 80% of the protoplasm. In the protoplasm, the water occurs in two forms, viz, free water and bound water. The 95% of the total cellular water is used by the protoplasm as the solvent for various inorganic substances and organic compounds and is known as free water. The remaining 5% of the total cellular water remains loosely linked with protein molecules by hydrogen bonds or other forces and is known as bound water.

The most abundant substance found in protoplasm–

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