Which of the following requires yeast in its production method?
hope this helps Skimmed milk- yes (sorry not sure why, but i looked on the internet and it seems it does) Bread- most breads are leavened by yeast Beer/wine- The first winemakers did not realise the spontaneous fermentation of their grapes was caused by the wild yeasts that collected on the skins of the grapes. Some styles of beers still make use of wild yeasts but as the yeast has such a contribution to make to the character of the final beer, most modern brewers prefer to control the yeast culture. They style of ales we produce uses top fermenting yeast. These are yeasts that form a foam on the top of the beer during fermentation. This foam is skimmed at a certain stage in the fermentation and used to start the next beer fermenting. These yeasts are used at higher temperatures. They are pitched in at around 15 deg C and the fermentation temperature rises as the yeast culture grows. The temperature can rise to 25C or more but must be controlled to prevent undesirable products being pr
