Which device is used to suction liquids into or expel liquids out of pipettes?

Which device is used to suction liquids into or expel liquids out of pipettes?

• A. Pipette-Aids
• B. Microcentrifuge
• C. Petri Dish
• D. Peg Rack

Answer: (A)

Creating a controlled suction to move liquids with a pipette is done with a pipette-aid. This device is designed to generate negative pressure so you can draw liquid into the pipette tip and then push or release it to expel the liquid. It provides a safe, precise way to transfer volumes, and it also helps avoid mouth pipetting. In contrast, a microcentrifuge spins samples, a Petri dish is used for growth or culture, and a peg rack is simply a holder—none of these create or control suction for pipetting.

Creating a controlled suction to move liquids with a pipette is done with a pipette-aid. This device is designed to generate negative pressure so you can draw liquid into the pipette tip and then push or release it to expel the liquid. It provides a safe, precise way to transfer volumes, and it also helps avoid mouth pipetting. In contrast, a microcentrifuge spins samples, a Petri dish is used for growth or culture, and a peg rack is simply a holder—none of these create or control suction for pipetting.