antioxidant. 1  Chemistry. any substance that inhibits oxidation, as a substance that inhibits oxidative deterioration of gasoline, rubbers, plastics, soaps, etc. 2  Biochemistry. an enzyme or other organic substance, as vitamin E or beta carotene, that is capable of counteracting the damaging effects of oxidation in animal tissues.
Amino acids are natural monomers that polymerize at ribosomes to form proteins. Nucleotides, monomers found in the cell nucleus, polymerize to form nucleic acids â DNA and RNA.Glucose monomers can polymerize to form starches, glycogen or cellulose; xylose monomers can polymerise to form xylan.ucleotides, monomers found in the cell nucleus, polymerize to form nucleic acids â DNA and RNA. Glucose monomers can polymerize to form starches, glycogen or cellulose; xylose monomers can polymerise to form xylan.
Proteins are made up of amino acids. Proteins carry out most of the chemical activity in cells. Proteins are made of smaller molecules called amino acids. Amino acids contain the elements carbon, oxygen, hydrogen, nitrogen, and sometimes sulfur.