Which of the following actions is NOT PERMITTED when handling GMOs?

Question

BlackTom AI · Accepted Answer

Containment of genetically modified organisms (GMOs) relies on closed barriers, controlled airflow, and strict hygiene. Propping open windows or doors defeats those containment measures and is therefore not permitted.

Relevant knowledge points and concepts:
- Primary containment: physical barriers (closed doors, windows, biosafety cabinets) prevent escape of organisms and limit aerosol spread.
- Facility airflow: many labs use directional airflow or negative pressure so air moves into, not out of, containment zones; open doors/windows disrupt this.
- Standard biosafety practices: dispose contaminated materials in designated biohazard containers, remove PPE before exiting containment areas, and wash hands upon leaving.

Step-by-step reasoning:
1. If windows or doors are propped open, the controlled airflow and physical barrier are lost. This can allow aerosolized particles, droplets, or other materials containing GMOs to exit the containment area.
2. Escape of GMOs increases risk of environmental release, cross-contamination of other workspaces, and exposure of personnel or the public.
3. By contrast, placing contaminated materials into biohazardous waste containers keeps infectious or modified materials segregated for autoclaving or proper disposal, which is a required practice.
4. Removing PPE when leaving the containment area is standard procedure to prevent carrying contaminants outside the facility (done in a proper doffing area).
5. Washing hands with soap and water upon leaving is an essential personal hygiene control to remove any residual contamination.

Why the correct answer is correct:
- Propping open windows or doors directly undermines containment and is explicitly prohibited in biosafety protocols.

Why the other options are incorrect:
- Disposing of contaminated material in biohazardous waste containers is required and permitted.
- Removing PPE when leaving the facility is required to avoid taking contamination outside.
- Washing hands with soap and water when leaving is required hygiene practice.

Conclusion: Propping open windows or doors is NOT permitted when handling GMOs. This matches the provided correct answer.

Which of the following actions is NOT PERMITTED when handling GMOs?单项选择题

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