Yeast is a leaven. A chemical reaction between the yeast and water creates tiny gas bubbles, making dough expand.
Leaven.
No. If you mix yeast and grape juice you get wine.
20g fresh yeast is approximately equivalent to 7g dried yeast
Yeast is used to leaven bread and other yeast doughs. Powdered or "dry yeast" can be stored without refrigeration and is more convenient than cakes of moist yeast.
Dried yeast typically lasts for about 2 years before it expires.
Mark 8:15 - Then He charged them, saying, "Take heed, beware of the leaven of the Pharisees and the leaven of Herod." [NKJV]In the Bible, "leaven" is used both literally (the yeast that makes bread rise) and figuratively (a relatively small force or amount that nonetheless makes a major impact). As used by Jesus in Mark 8:15, "leaven" refers to a "corrupting influence."
Yeast is a living organism. It is a type of fungus that reproduces through a process called fermentation, which is used to leaven bread and ferment alcoholic beverages.
No one drank wine, it was fruit of the vine (grape juice). During the passover they were not to eat or even have leaven in their homes. Alcohol is made out of yeast(leaven) which they were not to eat.
Dried yeast should keep for about a year in the freezer if kept in airtight packaging.
-- carbon dioxide -- alcohol, if not attended to -- spores to make more yeast, if properly cared for
Yes, yeast can go bad over time if it is not stored properly or if it is past its expiration date. When yeast goes bad, it may lose its ability to ferment and leaven dough effectively.
No, yeast and baking powder are not interchangeable in recipes. Yeast is a living organism that requires time to ferment and leaven dough, while baking powder is a chemical leavening agent that works instantly.