Which biosafety cabinet type is designed to protect both the product and the user from contamination when handling Risk Group 2 microorganisms?

Question

BlackTom AI · Accepted Answer

To address the question, let’s consider what each biosafety cabinet type is designed to protect. 
Option 1: Class I. This cabinet provides protection for the user and the environment but offers no protection for the product. It filters the air entering the cabinet but does not ensure product sterility, which makes it unsuitable when preserving the integrity of the sample itself. 
Option 2: Class III. This is a completely enclosed, gas-tight, negative-pressure cabinet that is used for the highest risk work and typically requires full-body protective gear; it provides maximum product and user protection but is not the standard choice for routine RG2 work since it is more specialized and cumbersome. 
Option 3: Class II. This type balances protection for both the user and the product. It uses HEPA-filtered air for both the inflow and exhaust, maintaining a sterile work area for the sample while protecting the operator. It is specifically designed for handling Risk Group 2 microorganisms where both the product and the user need protection. 
Option 4: Laminar flow hood. A laminar flow hood (often a clean bench) primarily protects the product by delivering HEPA-filtered air across the work surface, but it does not protect the user and can even pose a risk to the operator when handling hazardous materials, making it unsuitable for RG2 containment work. 
In summary, among the choices, Class II cabinets provide dual protection—safeguarding both the product and the user—which matches the requirement for handling RG2 microorganisms. The other options either emphasize protection for the user only, require more specialized use, or protect only the product without user protection.

Which biosafety cabinet type is designed to protect both the product and the user from contamination when handling Risk Group 2 microorganisms?单项选择题

类似问题

What was the world's first widely adopted biodiversity policy?

The aim of the Paris Agreement is to ensure that the earth’s preindustrial temperature is not exceeded by more than º Celsius.

The IPCC's mission is to Blank ______.

Why have most international agreements for environmental protection been based on the honor system?

As was exhibited with the Montreal Protocol and the encouragement of reduced CFC production, trade can be an effective tool to compel compliance with international treaties.

The Stockholm Declaration and UNEP were the result of the Blank ______ first conference on the Human Environment in 1972.

In addition to the direct mission of the Convention on International Trade in Endangered Species (CITES), why was CITES so important?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单