Bacteria - A large group of unicellular microorganisms that lack a cell nucleus. Some bacteria are pathogenic and harmful to humans, some have no effect at all on humans, and some are beneficial.⏎
Cell Membrane - A semipermeable barrier that separates the interior of a cell from the external environment.⏎
Bioweapon - A bacterium, virus, or other biological toxin used in bioterrorism or biological warfare.⏎
Beta-lactam Antibiotics - One of several families of antibiotics, including penicillins, cephalosporins, carbapenems, and monobactams, containing a molecular ring-shaped structure made up of three carbon atoms and one nitrogen atom.⏎