BETA
Chapter 1
The secret life of yeast
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Answer
Chapter 2
The magic of sourdough
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Chapter 3
Gluten and the dough balloon
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Chapter 4
Fermenting around the world
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YOUR GOAL
Master of How bread rises
Ch 1 · The secret life of yeast
alicecooks Yeast in bread dough
Yeast is breathing out those bubbles (oh yeah!) / Making that gluten stretch and grow! (stretch and grow!)
alicecooks Temperature acts as a biological thermostat for yeast, controlling how fast it eats, multiplies, or whether it survives at all.
alicecooks Yeast consumes sugars present in flour, converting them into carbon dioxide gas and alcohol through a biological process called fermentation.
Fun Fact
Yeast's ancient genome: Yeast was the first single-celled eukaryote to have its entire DNA sequenced by scientists in 1996.
Glossary
yeast (noun)
A microscopic, single-celled fungus capable of converting sugar into alcohol and carbon dioxide. In 1857, Louis Pasteur proved that this living organism is responsible for fermenting bread dough.
A microscopic, single-celled fungus capable of converting sugar into alcohol and carbon dioxide. In 1857, Louis Pasteur proved that this living organism is responsible for fermenting bread dough.
Quiz
What liquid byproduct does yeast produce alongside carbon dioxide during the fermentation of bread dough?
Quiz
Which gas does baker's yeast release that causes bread dough to inflate and rise?
Quiz
How does active dry yeast react when placed in ice-cold water below 40 degrees Fahrenheit?
Quiz
What is the primary food source that yeast consumes within flour to fuel fermentation?
Quiz
Which scientific instrument is required to see an individual yeast cell clearly?
Quiz
How many individual yeast cells are roughly estimated to live in a single one-gram packet of active dry yeast?
Quiz
What type of organism is Saccharomyces cerevisiae, the standard yeast used in bread baking?
Quiz
At what approximate temperature does baker's yeast die, halting the fermentation process entirely?