Answer:
Proteins even make up most of your hair. ... While a structure such as a nucleus is only found in eukaryotes, every cell needs ribosomes to manufacture proteins. Since there are no membrane-bound organelles in prokaryotes, the ribosomes float free in the cytosol. Ribosomes are found in many places around a eukaryotic cell.
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This isn't my answer, BUT, you can read more about the prokaryotic cells and their functions, and what they're made up of here at this website: