Yeast

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  • Created by: Abbie
  • Created on: 12-05-12 09:54

Yeast

Yeast is a single-celled fungus, it's a microorganism with a nucleus, cytoplasm, vacuole, cell membrane and a cell wall.

(http://www.ilri.org/InfoServ/Webpub/fulldocs/ilca_manual4/images/FIG%2011%20P19.gif)

Yeast can respire with or without oxygen:

Anaerobically (called fermentation) -                                                                        glucose ------> ethanol + carbon dioxide + energy

Aerobically (needed to grow and reproduce) -                                                         glucose + oxygen ------> carbon dioxide + water + energy

Bread making:

  • Yeast is used in dough to produce nice, light bread
  • The yeast converts sugars to carbon dioxide…

Comments

Lamise Hassan

Good but i swear the sugary solution for beer is fermented by yeast THEN hops are added and THEN sieved?

Siobhan

I agree^

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