Multiple choice

Preserving a culture for year would best be achieved by

  1. refrigeration

  2. deep-freezing

  3. lyophilizing

  4. leaving at room temperature
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lyophilization, commonly known as freeze-drying, removes water from biological samples by sublimation under a vacuum, allowing cultures to be preserved stably for years without losing viability.

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