Question
Fermentation of idli and dosa batter involves :
The correct answer is
Mixed lactic acid and alcoholic fermentation
Fermentation Process in Idli and Dosa Batter
The characteristic texture and flavor of idli and dosa are achieved through a complex microbial process involving the batter.
Microorganisms Involved
Idli and dosa batter typically contain a mix of microorganisms, primarily:
- Yeast (like Saccharomyces cerevisiae)
- Lactic acid bacteria (LAB, such as Lactobacillus species)
Dual Fermentation Mechanism
These microorganisms work together to produce a mixed fermentation:
- Alcoholic Fermentation: Yeast consumes carbohydrates (sugars) in the batter and produces ethanol (alcohol) and carbon dioxide gas ($\text{CO}_2$). The released $\text{CO}_2$ gas causes the batter to rise and become fluffy.
- Lactic Acid Fermentation: Lactic acid bacteria convert sugars into lactic acid. This acid contributes a tangy flavor and also helps to tenderize the batter components (rice and lentils).
The combination of $\text{CO}_2$ production (from yeast) and lactic acid formation (from bacteria) leads to the desirable airy texture and distinct taste of South Indian idli and dosa.
Conclusion on Fermentation Type
Therefore, the fermentation process for idli and dosa batter is correctly identified as a mixed lactic acid and alcoholic fermentation.
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Important Questions from Miscellaneous
- Which of the following scheduler/schedulers is/are also called CPU scheduler ?
(A). Short Term Scheduler
(B). Long Term Scheduler
(C). Medium Term Scheduler
(D). Asymmetric Scheduler
Choose the correct answer from the options given below: - A situation where two or more processes are blocked, waiting for resources held by each other is called:
- External fragmentation occurs ________.
- Which disk scheduling algorithm looks for the track closest to the current head position?
- Which CPU scheduling algorithm prefers the process with the shortest burst time?
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