1.

How many chemicals constitute a cell ?

Answer»

The cells of living things are made mainly of four elements: carbon, hydrogen, oxygen and nitrogen. They make up 96% of the atoms that are in living things, so they would be considered major chemicals

other elements that only make up a few percent of cells can top the list.

If major also means essential for life, then “trace elements” are very major though they make up just 0.5% of the atoms in an organism



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