Q.Distinguish between the roles of Saccharomyces cerevisiae in bread-making and in the production of toddy (a traditional fermented palm sap beverage).

[!TLDR] Both use Saccharomyces cerevisiae, but in bread it releases CO2 to leaven dough, while in toddy it ferments palm sap sugars into ethanol as a drink. …

Saccharomyces cerevisiae plays both roles through the same basic fermentation chemistry -- converting sugar into ethanol and carbon dioxide -- but each application values a different product of that reaction. In bread-making, the yeast is mixed into wheat dough, and it is specifically the carbon dioxide gas released during fermentation that matters: trapped within the dough's elastic gluten network, this gas causes the dough to rise, giving bread its light, porous texture; the small amount of ethanol produced simply evaporates during baking and is not the desired product. In toddy production, by contrast, wild yeasts (often including strains of Saccharomyces) act on the sugar-rich sap collected from palm trees, and it is the ethanol produced by this fermentation that is valued, s …

Recognise this is a 'same organism, different valued product' question: identify what chemical product each application actually cares about …

A common gap is failing to note that the SAME fermentation reaction happens in both cases -- students often describe them as entirely different proce …