informal group of fungi

Yeast are microorganisms. They are single-celled fungi. There are about 1,500 different species of yeast. Most reproduce asexually, by budding. Some use binary fission to reproduce asexually.

S cerevisiae under DIC microscopy.jpg
Yeast cells under a microscope.
Simple diagram of yeast cell (en).svg
A diagram of a typical yeast cell
Scientific classification
Typical divisions

Ascomycota (sac fungi)

A particular species of yeast, Saccharomyces cerevisiae, has been used for thousands of years. It is used for baking bread because the yeast makes carbon dioxide as a by-product of it eating sugar. Yeast is also used for making beer due to a process known as fermentation. This process produces both ethyl alcohol and carbon dioxide.[1] Ethanol is also used as fuel, and to make other organic chemicals.

Yeast can be used to make electricity. Yeast is also a model organism for studying cell biology. Some yeasts can cause infections in humans (they are pathogens).

Related pagesEdit


  1. Effects of Water Temperature on Production of Carbon Dioxide Foam by Yeast - Sophie Challis

Other websitesEdit

  Media related to Yeast at Wikimedia Commons