Which item is considered specialized equipment needed for PCR?

Which item is considered specialized equipment needed for PCR?

• A. Thermal Cycler
• B. Balance
• C. Centrifuge
• D. pH Meter

Answer: (A)

PCR relies on precise, programmed temperature cycling to repeatedly denature DNA, allow primers to anneal, and extend new strands. The thermal cycler provides the exact temperatures, rapid and controlled changes, and uniform heating across all samples, along with features to prevent evaporation, making it specialized for this technique. Other common lab tools like a balance, centrifuge, and pH meter perform general tasks—weighing, separating components by spin, and measuring acidity—but they do not carry out the temperature cycling required for PCR, so they are not specialized equipment for this purpose.

PCR relies on precise, programmed temperature cycling to repeatedly denature DNA, allow primers to anneal, and extend new strands. The thermal cycler provides the exact temperatures, rapid and controlled changes, and uniform heating across all samples, along with features to prevent evaporation, making it specialized for this technique. Other common lab tools like a balance, centrifuge, and pH meter perform general tasks—weighing, separating components by spin, and measuring acidity—but they do not carry out the temperature cycling required for PCR, so they are not specialized equipment for this purpose.