i. Oxidoreductases, transferases, hydrolases, lyases, isomerases, ligases.
ii. Polysaccharides and glycolipids.
iii. Saccharomyces cerevisiae.
iv. Rifamycin.
v. Penicillin, cephalosporins, monobactam, erythromycin, gentamycin, neomycin, streptomycin, tetracyclins, vancomycin.