They can be arranged according to the specific action it has on the cell. For example, certain antibiotics attack the cell wall, others concentrate on the cell membrane, but most obstruct protein synthesis. Another form of indexing antibiotics is by their actual chemical structure. Practically all antibiotics deal with the obstruction of synthesis of the cell wall, proteins, or nucleic acids. Some antibacterials interfere with the messenger RNA, consequently mixing up the bacterial genetic code.
Penicillins act by inhibiting the formation of a cell wall.
Penicillin is usually prescribed to treat syphilis, gonorrhea, meningitis, and anthrax. Tetracycline inhibits protein synthesis in pathogenic organism. This antibiotic is obtained from the culture of Streptomyces. Streptomycin an antibiotic agent which is obtained from Streptomyces griseus. This antibiotic acts by limiting normal protein synthesis.