In which process is the formation of carbon dioxide by yeast during fermentation clearly seen?
Answer and explanation
Correct answer: Rising of dough
The governing concept is alcoholic fermentation by yeast. In the absence of sufficient oxygen, yeast breaks down glucose and forms ethanol and carbon dioxide. When yeast is mixed with dough, the released carbon dioxide becomes trapped as bubbles in the dough’s gluten network. These bubbles expand during resting or heating, making the dough rise. Therefore A is correct; blood clotting, urine formation, and stomatal closure do not use yeast fermentation.
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What is the correct answer to this question?
Rising of dough
Why is this the correct answer?
The governing concept is alcoholic fermentation by yeast. In the absence of sufficient oxygen, yeast breaks down glucose and forms ethanol and carbon dioxide. When yeast is mixed with dough, the released carbon dioxide becomes trapped as bubbles in the dough’s gluten network. These bubbles expand during resting or heating, making the dough rise. Therefore A is correct; blood clotting, urine formation, and stomatal closure do not use yeast fermentation.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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