What is a key feature of a biosafety cabinet?

A key feature of a biosafety cabinet is that it is sealed to protect from biohazards. This design creates a controlled environment that helps prevent the escape of harmful microorganisms and contaminants into the surrounding area while ensuring that the samples within the cabinet are also safe from external contamination. Biosafety cabinets create negative pressure zones that filter the air using HEPA filters, which trap particulates and pathogens, thus safeguarding the user, the environments, and the samples being handled.

In contrast, options highlighting an open environment, the presence of computers for data analysis, or operation at high temperatures do not correspond to the primary purpose of a biosafety cabinet. In a laboratory setting, maintaining a protected environment is critical, and these other features do not relate directly to the core function of biosafety cabinets.