Carbon Based Life Life is based upon 20 different chemical elements Four of these make up 96% of the mass in cells Oxygen …… 65.0% Carbon …... 18.5% Hydrogen.
NUCLEIC ACIDS RNA and DNA. Nucleic Acids A nucleic acid is a macromolecule composed of chains of monomeric nucleotides. In biochemistry these molecules.
Chp. 7- Cell Theory & Parts. The Discovery of Cells Robert Hooke (1665) –Looked at cork under a microscope. –Saw many little boxes. –Called them cells.
