What is yeast?

What is yeast? Qwiki Video


What is baker's yeast? Qwiki Video


Facts about Yeast

  • Used in ancient Egypt – images are found in ancient hieroglyphics

  • Uses
    • Fermentation – in beer and wine, sugar concerted to alcohol

    • Baking – used to make the dough rise

  • Yeast is a tiny form of fungi scientists refer to as “microorganisms”.

  • They are egg-shaped cells that can only be seen with a microscope.

  • It takes 20,000,000,000 (twenty billion or 2.0 X 1010) yeast cells to weigh one gram or 1/28 of an ounce.

  • scientific name – Saccharomyces cerevisiae
“sugar eating fungus”


  • Yeast cells digest food to obtain energy for growth.