The essential amino acids cannot be produced in the human body and hence these amino acids have to be obtained through the diet. Hence these amino acids have this characteristic that these cannot be produced in the human body and have to be obtained through diet this makes them essential. Hence those nine amino acids are considered as the essential amino acids.
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Answer:
c. DNA provides the information to make proteins for the cell.
The mass is made up of protons and neutrons, the valence electrons only determine stability, not mass