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The preservation by liquid Nitrogen is called as ___________

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The preservation by liquid Nitrogen is called as ___________

(a) Cryopreservation

(b) Lyophilization

(c) Freeze-drying

(d) Desiccation

I have been asked this question in class test.

This interesting question is from Preservation of Industrial Microorganisms topic in division The Isolation, Preservation and Improvement of Industrial Microorganisms of Fermentation Technology

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Correct answer is (a) Cryopreservation

For explanation: The preservation by liquid Nitrogen is called as Cryopreservation. The cryoprotective agents are added to the culture before preservation, hence the name, Cryopreservation.

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