The biosafety level (BSL) for most introductory microbiology laboratories isGroup of answer choicesBSL-2.BSL-4.BSL-3.BSL-1.

Identifying Biosafety Levels

1. Understanding Biosafety Levels: Biosafety levels range from BSL-1 to BSL-4, with BSL-1 being the lowest and BSL-4 being the highest. Each level indicates the safety precautions required when working with pathogens.

2. Biosafety Level Descriptions:

   • BSL-1: Suitable for work with non-pathogenic microorganisms. Basic safety procedures are sufficient.
   • BSL-2: Involves moderate-risk pathogens, requiring additional precautions such as access control and biological safety cabinets.
   • BSL-3: Designed for work with pathogenic and potentially lethal agents, requiring more advanced safety measures.
   • BSL-4: The highest level, used for work with dangerous pathogens that pose a high risk of aerosol transmission.

3. Typical Uses in Introductory Laboratories: Most introductory microbiology laboratories primarily deal with moderate-risk organisms and therefore operate at BSL-2.

Final Answer

The correct answer is BSL-2.