- A Routine, everyday research involving common, non-pathogenic laboratory bacterial strains generally used in routine practice
- B Work with dangerous pathogens with no treatment or vaccine (Ebola, Marburg, Nipah virus) that are transmitted by aerosol
- C Work that is limited mainly to the handling of hazardous laboratory chemical reagents in storage overall in most cases
- D Culturing of mostly non-pathogenic fungal species for routine taxonomic study purposes generally under typical conditions
Correct answer: B. Work with dangerous pathogens with no treatment or vaccine (Ebola, Marburg, Nipah virus) that are transmitted by aerosol
Explanation: BSL-4: maximum containment for dangerous, exotic agents (Ebola, Marburg, smallpox). Full-pressure suits or class III biosafety cabinets. Researchers shower on exit. No established treatment.
Concept context
Recombinant DNA, GMOs, PCR, CRISPR, and biotechnology applications. Growing importance in NEET.
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