Which simple tool is used to retrieve an inoculum from a culture of microorganisms?

Which simple tool is used to retrieve an inoculum from a culture of microorganisms?

• A. Pipette-Aids
• B. Microcentrifuge Tubes
• C. Petri Dish
• D. Inoculating Loop

Answer: (D)

Retrieving an inoculum from a culture relies on collecting a small, controllable amount of microorganisms while keeping things sterile. An inoculating loop is ideal for this because its slender, sterilizable wire tip can touch a colony on a plate or skim broth to pick up only a tiny amount of material. It’s designed for quick sterilization between transfers, helping maintain aseptic technique and prevent contamination. The loop also allows you to spread or streak the sample onto another medium as needed. By comparison, a pipette-Aids is mainly for transferring liquid volumes, not for picking up material from a solid surface; microcentrifuge tubes are containers for holding samples; a Petri dish is the growth surface itself, not a tool for extracting material.

Retrieving an inoculum from a culture relies on collecting a small, controllable amount of microorganisms while keeping things sterile. An inoculating loop is ideal for this because its slender, sterilizable wire tip can touch a colony on a plate or skim broth to pick up only a tiny amount of material. It’s designed for quick sterilization between transfers, helping maintain aseptic technique and prevent contamination. The loop also allows you to spread or streak the sample onto another medium as needed. By comparison, a pipette-Aids is mainly for transferring liquid volumes, not for picking up material from a solid surface; microcentrifuge tubes are containers for holding samples; a Petri dish is the growth surface itself, not a tool for extracting material.