Multiple choice

Who discovered the process of intermittent heating to kill spores?

  1. Louis Pasteur

  2. Joseph Lister

  3. Griffith Evans

  4. John Tyndall
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D Correct answer
Explanation

John Tyndall developed a process of intermittent heating to kill spores known as Tyndallization. Tyndallization essentially consists of heating the substance to boiling point (or just a little below boiling point) and holding it there for 15 minutes, three days in succession. After each heating, the resting period will allow spores that have survived to germinate into bacterial cells; these cells will be killed by heating the next day.

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