Why must the yeast and sugar mixture be left in the water bath before timing starts?

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Question

Why must the yeast and sugar mixture be left in the water bath before timing starts?

Accepted Answer

To let the mixture reach the set temperature throughout — Timing before it has equilibrated would measure a temperature the mixture never actually had.

Answer

To let the yeast die off to a steady number

Answer

To remove all the oxygen from the flask

Answer

To allow the sugar to dissolve completely

Answer

To let the mixture reach the set temperature throughout

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