An autoclave is

• A. A UV light device used for sterilization
• B. A cleaning solvent
• C. A dry heat oven
• D. Device used to destroy all microbes with heat and pressure

Answer: (D)

An autoclave sterilizes by moist heat under high pressure, destroying all microorganisms including spores. The steam under pressure raises the effective temperature (typically around 121°C/250°F) and, with enough time, denatures proteins and disrupts cell membranes, achieving sterilization quickly and reliably. This combination—steam, heat, and pressure—penetrates materials and achieves a level of sterilization that dry heat or chemical methods alone cannot match.

It differs from methods like UV light, which provides radiation with limited penetration and isn’t reliable for fully sterilizing many instruments; cleaning solvents that act as chemical disinfectants rather than true sterilants; and dry heat ovens that rely on hot air (without moisture) and generally require longer cycles and higher temperatures.