Yeast

Question 1

Yeast

Answer 1

Single celled
-Eukryotic
-Cell walls like plants
-Non-photosynthetic
-Non-motile
-0.5-10µm, much bigger than bacteria

Question 2

Saccharomyces cerevisae: Ale yeast

Answer 2

-37-44° max growth temp
-18-22° fermentation temp
-Floats to surface
-Fewer sugars used
-Big flavortown

Question 3

Saccharomyces pastorianus: Lager yeast

Answer 3

-32-40° max growth temp
-7-15° fermentation temp
-Sinks to bottom
-More sugars used
-Clean/light flavortown

Question 4

Yeast organelles: Cell wall and membrane

Answer 4

-Cell wall: strength and shape, bud scars from cell division
-Plasma membrane: barrier between cell and environment, phospholipids and sterols

Question 5

Yeast organelles: Nucleus

Answer 5

-Genetic material
-16 chromosomes (~6000 different genes)

Question 6

Yeast organelles: Mitochondria

Answer 6

The powerhouse of the cell!

Question 7

Yeast organelles: Vacuole

Answer 7

Combo recycling plant and warehouse
-Big compounds sent here to be broken down, stored, and used later

Question 8

Yeast organelles: Cytoplasm

Answer 8

-Fatty materials and glycogen: jelly that stores all organelles
-Main way yeast stores those sweet sweet sugars

Question 9

Yeast storage

Answer 9

-Not exposed to air
–Nitrogen or Co2
-3 days or less
-2-4°
–Low temps: slow down cell activity ie breakdown of glycogen (the chain of clucose that yeast uses in starvation mode)