Which of the following is a potential application of bacteriocins?

• A. Vaccine development
• B. Probiotic fermentation
• C. Iron chelation
• D. Antibiotic replacement

Answer: (D)

Bacteriocins are antimicrobial peptides produced by bacteria that can act as targeted antibiotics. Their strength lies in potent activity against specific pathogens and mechanisms that disrupt bacterial cells, such as forming pores in membranes or interfering with essential processes. Because of these properties, they’re being explored as antibiotic replacements in certain settings, offering potential treatments especially where resistance to conventional drugs is a concern. While they are also used to preserve foods and can be produced by probiotic strains, the key idea is their direct antimicrobial action that could substitute traditional antibiotics in appropriate contexts. Vaccine development or iron chelation address different biological goals, and probiotic fermentation relates more to using beneficial microbes for fermentation, though bacteriocin production can play a supporting role there.