Lab skill: Micropipettes

What is the primary function of a micropipette in a laboratory setting?

• To transfer large volumes of liquid

• To measure the temperature of solutions

• To transfer tiny, precise volumes of liquid

• To mix different chemical solutions

Pipettes transfer milliliters (mL) of liquid, while micropipettes transfer _ (μL) of liquid

When drawing up liquid with a micropipette, which plunger stop should be used, and when should the plunger be pressed?

• First stop, before inserting the tip into the liquid

• Second stop, before inserting the tip into the liquid

• First stop, after inserting the tip into the liquid

• Second stop, after inserting the tip into the liquid

What is the main reason for using a fresh, clean tip for each liquid transfer with a micropipette?

• To prevent damage to the micropipette

• To ensure accurate temperature measurement

• To avoid cross-contamination between samples

• To speed up the liquid transfer process