Yeast is any eukaryotic type organism and they are classified as microscopic life fungi made up of a single type of cells (unicellular), these are important in the decomposition process of all organic matter under the use of the process known as fermentation, the The main compounds that are victims of this process are carbohydrates and their various types of sugars, depending on the compound that is broken down, a different product will be obtained. The yeast species are varied, despite the fact that botanists only consider as real yeast those that belong to the class " Ascomycota", In the area of microbiology yeasts belonging to the species" Basidiomycetes have been described.
Yeasts are usually accompanied by each other in the form of chains, to achieve the decomposition of carbohydrates, yeasts have different enzymes that catabolize the reactions used in this process. The best known member of the yeast group is the species "Saccharomyces cerevisiae", this yeast is characterized by growing under an anaerobic metabolism (without oxygen) using what is alcoholic fermentation, this type of yeast is applied for the production of chemical materials that use fermentation such as: bread, antibiotics, wine, mead and beer, this artificial yeast known as "chemical yeast" that is nothing more than the union of all the enzymes that make up said cellular organism.
The reproduction of yeasts are asexual in nature (without sexual contact) through budding or budding, as well as it can reproduce sexually through the use of ascospores and basidiospores depending on the species that is being talked about. In sexual reproduction, the new progeny grow very close to the mother yeast, this new piece separates from it when it acquires the necessary qualities to live alone, this new progeny is known by the name of "yolk"; When they develop under conditions of nutrient shortage, yeasts reproduce sexually in the form of ascospores, there is a group of fungi that do not complete the sexual cycle and are known as candida.
