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Why is agar preferable to gelatin as a solidifying agent in culture media?

April 26, 2017agar agent Biology culture gelatin Mathematics preferable solidifying

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Why is agar preferable to gelatin as a solidifying agent in culture media?

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Agar is preferable to gelatin as a culture media because it can be used as a semisolid medium at a wide range of temperature for incubation. Agar melts at 100C, and it cannot provide nutrients to most bacteria. However, gelatin melts at about 27C and can provide nutrients to bacteria, and so it is unsuitable as a culture medium.