what are proteins?

In terms of numbers, cells are mostly filled up with water molecules - the grains of sand. Water gives  a cell’s insides the consistency of soft jelly and enables other things to move around easily. Almost all the other things, the rice and fruit, are proteins. Several billion in total, more than 10,000 different kinds depending on the function of the cell. Your cells are basically protein robots, as is all life really. In fact all solid, nonfat parts of your body are  mostly made out of protein – even your bones. Proteins are dead things that make  life happen. How does this work?

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