Which feature of a Biological Safety Cabinet provides product protection?

• A. Inward airflow provides personal protection.
• B. Downward HEPA filtered laminar airflow provides product protection.
• C. HEPA exhaust system provides environmental protection.
• D. UV lighting sterilizes the cabinet.

Answer: (B)

Product protection in a biological safety cabinet comes from the downward laminar airflow that is HEPA-filtered and directed across the work surface. This creates a clean, containment-friendly zone around the material, so contaminants in room air are kept from settling onto or entering the product. The air is filtered before reaching the work area, removing particulates and microorganisms, and the unidirectional flow minimizes turbulence that could draw contaminants into the product. Inward airflow at the front protects the user, the exhaust system with HEPA filtration protects the environment, and UV lighting is not relied upon for protecting the product.