Storage of biological tissues such as blood, organs, semen requires lo

Storage of biological tissues such as blood, organs, semen requires low temperature which is achieved upon the usage of

[amp_mcq option1=”Liquid nitrogen” option2=”Solid carbon dioxide” option3=”Liquid air” option4=”Helium” correct=”option1″]

This question was previously asked in
UPSC CDS-2 – 2022
Storage of biological tissues such as blood, organs, and semen at very low temperatures (cryopreservation) is typically achieved using Liquid nitrogen.
– Liquid nitrogen has a boiling point of -196°C (-320°F).
– This extremely low temperature freezes biological samples and halts cellular activity and degradation.
– Cryopreservation methods often involve cooling biological material to liquid nitrogen temperatures for long-term storage.
Solid carbon dioxide (dry ice) provides a temperature of -78.5°C, which is not sufficiently low for long-term cryopreservation of most biological tissues. Liquid air and helium are less commonly used than liquid nitrogen for standard biological sample storage due to cost, availability, or specific temperature requirements.