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PPSC Past Paper 2025 (Labour Officer)

PPSC · 2025 · Practice with instant answers and explanations

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Question 55 of 97
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Question55
Past PaperPPSC

Which liquefied gas is used biologically for preserving human tissues, organs and cells?

Correct Answer: Option D — Nitrogen
Explanation:
Liquid nitrogen is used for cryopreservation of biological samples, tissues and cells.
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