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Protoplasm
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=== Chemical composition === There are about 30 elements, like [[carbon]], [[hydrogen]], [[oxygen]], [[phosphorus]], [[Sulfur|sulphur]], [[calcium]] and many others which are identified in protoplasm of different cells. They form compounds, like [[water]] (65-80%), [[Carbohydrate|carbohydrates]], [[Ion|ions]], [[Protein|proteins]], [[Lipid|lipids]], [[Nucleic acid|nucleic acids]] ([[DNA]] and [[RNA]]), [[Fatty acid|fatty acids]], [[glycerol]], [[Nucleotide|nucleotides]], [[Nucleoside|nucleosides]] and [[Mineral|minerals]]. They are living as long as they are part of protoplasm. They are not able to perform functions of life independently. The composition of protoplasm is inconsistent and continuous changes take place in it.<ref name=":0" />
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