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Sugar added to the dough acts as food for yeast. Yeast will consume sugar and produce $$CO_2$$ through anaerobic respiration process. This $$CO_2$$ will help in rising the dough.
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Q
1
Question 18
A food stall owner was preparing dough for making bhaturas. He added a pinch of yeast and sugar to the dough and left it in a warm place. After few hours, the dough had risen. There was a sour smell too.
(a) Why did the dough rise?
(b) Why did the dough smell sour?
(c) Why was sugar added to the dough?
(d) What would have happened if the dough was kept in the refrigerator, soon after it was prepared?
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Q
2
A food stall owner was preparing dough for making bhaturas. He added a pinch of yeast and sugar to the dough and left it in a warm place. After few hours, the dough had risen. There was a sour smell too. [2 marks] (a) Why did the dough rise?
(b) Why did the dough smell sour?
(c) Why was sugar added to the dough?
(d) What would have happened if the dough was kept in the refrigerator, soon after it was prepared?
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Q
3
A food stall owner was preparing dough for making bhaturas. He added a pinch of yeast and sugar to the dough and left it in a warm place. After few hours, the dough had risen. There was a sour smell too.
(a) Why did the dough rise?
(b) Why did the dough smell sour?
(c) Why was sugar added to the dough?
(d) What would have happened if the dough was kept in the refrigerator, soon after it was prepared?
[4 marks]
[NCERT Exemplar Q18]
[Anaerobic Respiration]
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Q
4
A food stall owner was preparing dough for making cake. He added a pinch of yeast and sugar to the dough and left it in a warm place. After few hours, the dough had risen. Why did the dough rise?
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Q
5
<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->A food stall owner was preparing dough for making cake. He added a pinch of yeast and sugar to the dough and left it in a warm place. After few hours, the dough had risen. Why did the dough rise?
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