Question

Few hours after mixing the dough, the cook weighs the dough and observes that its weight has decreased.
weight of the dough is the same at the start of each of the four
experiments shown below.
in two experiments should the cook compare to test if the yeast is the
cause of the loss of weight?

pls.... answer this quickly....
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Answer 1

Answer:

yes yeast decreases the weight. since it increase the air inside.

Answer 2

Experiment 3 & 4

Explanation:

Experiments 3 and 4 can be compared to test if yeast is the cause of weight loss

• Yeast in the dough metabolizes the starches and sugars in flour;yeast metabolizes simple sugars and exudes a liquid that releases carbon dioxide and ethyl alcohol into existing air bubbles in the dough
• In case of experiments  1 & 2 stopper is present which prevents gas from escaping hence in these weight loss cannot be studied
• In case of experiments 3 & 4 gas will escape out and hence loss in weight can be studied easily