Which item is described as the most basic pipet?

• A. Glass pipet
• B. Plastic pipet
• C. Metal pipet
• D. Rubber pipet

Answer: (A)

The basic idea here is understanding how simple pipetting tools differ by material and complexity. A glass pipet is the most foundational form: it’s just a straight glass tube, often used with a bulb to draw up and release liquid. It has no moving parts or built‑in mechanisms, so its operation relies on a simple suction and release method. This simplicity makes it the most basic type of pipet, easy to clean, reusable, and suitable for a wide range of liquids.

Plastic pipets are newer and designed for convenience and disposability, which adds a layer of practicality but not the fundamental simplicity of a glass tube. Metal pipets aren’t standard for routine pipetting in most labs. Rubber-related items are typically bulbs or droppers, not the actual pipet instrument, so they don’t occupy the same basic category as a straight glass pipet.

So, the glass pipet is the best answer because it embodies the simplest, least complex form of pipetting tool.