Question

Yeast is used in the fermentation of
A) Sugar
B) Alcohol
C) Hydrochloric acid
D) Oxygen

Answer 1

Fermentation is a metabolic process that involves the action of enzymes to produce chemical changes in organic substrates. It is narrowly defined in biochemistry as the extraction of energy from carbohydrates in the absence of oxygen.

Complete answer:
$\bullet$ In food production, it can refer to any process in which the activity of microorganisms causes a desirable change in a food or beverage. Zymology is the science of fermentation. Fermentation is the primary method used by microorganisms to produce adenosine triphosphate (ATP) through the anaerobic degradation of organic nutrients. Since the Neolithic period, humans have used fermentation to produce foodstuffs and beverages.
$\bullet$ Fermentation, for example, is used for preservation in the production of lactic acid, which is found in sour foods such as pickled cucumbers, kombucha, kimchi, and yoghurt, as well as for the production of alcoholic beverages such as wine and beer. Fermentation occurs in all animals' gastrointestinal tracts, including humans.
$\bullet$ Yeasts are eukaryotic, single-celled microorganisms that belong to the fungus kingdom. The first yeast appeared hundreds of millions of years ago, and at least 1,500 species are now known.
$\bullet$ In the fermentation process, the yeast Saccharomyces cerevisiae converts carbohydrates to carbon dioxide and alcohols. For thousands of years, the products of this reaction have been used in baking and the production of alcoholic beverages.

Therefore, Yeast is used in the fermentation of Sugar. So, the correct option is option (A).

Note: Fermentation, like aerobic respiration, is a method of extracting energy from molecules. This is the only method shared by all bacteria and eukaryotes. As a result, it is thought to be the oldest metabolic pathway, suitable for primeval environments – that is, before plant life on Earth, that is, before oxygen in the atmosphere.