1. Bojho saw his mother mixing some yeast powder in idli batter and keeping it for an
overnight. She explained Bojho that the yeast would help in making the idlis fluffy by a
process. What process do you think Bojho's mother was mentioning?
Answers
Explanation:
Saccharomyces cerevisiae is the fungus which is commonly known as baker's yeast. The yeast cells are added to the batter of idli and dosa. The fungus performs anaerobic fermentation. The fungus utilizes the fermentable sugars and convert them to ethanol and carbon dioxide. The carbon dioxide gas causes the dough to rise and become soft and fluffy. The carbon dioxide bubbles gets trapped in the dough and when baking is done, this bubbles break and forms pores.
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Explanation:
Idli (or) dosa's are prepared one day before to allow the fermentation to take place .When , yeast poweder (or) yeast is added to the dough for preparing bread , preparing idli , the dough rises . This is due to the anaerobic respiration of microorganism yeast which produces carbon dioxide gas . Bubbles of the gas fill the dough , increase the volume and make it spongy in nature. Hence , The process that Bojho's mother mentioning was Fermentation.
Commercial use of microorganisms :
Yeast is also used in process of conversion of sugars to alcohol . Yeast is also grown in some natural sugars present in grains like barley , wheat , rice and in may others .It is also used in the prepartion of ethyl alcohol.