Multiple choice

Which of the following methods is/are suitable for preserving bacteria for long periods?

  1. Refrigeration

  2. Deep-freezing

  3. Lyophilisation

  4. Both (2) and (3)

  5. None of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

It is the correct answer because both deep-freezing and lyophilsation are methods for storing bacterial cultures for long-periods.