Which tool is used to transfer very small, precise volumes of liquid, typically in microliters?

• A. Micropipette
• B. Hand Lens
• C. Graduated Cylinder
• D. Calipers

Answer: (A)

Transferring very small, precise volumes requires a device that can be set to an exact microliter amount and dispense it accurately. A micropipette is designed for this purpose: you dial in the volume in microliters, attach a disposable tip, aspirate the liquid, and release it with a controlled stroke. This provides high accuracy and precision at the microliter scale and helps prevent cross-contamination through disposable tips. The other tools serve different tasks: a hand lens is for magnification, not liquid handling; a graduated cylinder is used for measuring larger volumes with less precision at the microliter level; calipers measure physical dimensions, not liquids.