To be activated, yeast needs warmth, water, and sugar.
Yeast needs warmth, moisture and some form of sugar to be active and make carbon dioxide gas.
dry yeast does not become active until it is in contact with water fresh yeast is active all of the time
dry yeast does not become active until it is in contact with water fresh yeast is active all of the time
Yeast needs an appropriate temperature, water, and sugar to be active. If it does not have those three things, it will be inactive.
1 (6-ounce) cube or cake of compressed yeast (also know as fresh yeast) = 1 package of active dry yeast 1 package active dry yeast = about 2 1/4 teaspoons = 1/4 ounceTherefore, 1.5 ounces of compressed yeast = 1/16 of an ounce of active dry yeast or 1/4 of the package of active dry yeast.
1 1/2 tsp rapid rise yeast equals 2 tsp of active dry yeast
Instant yeast is another type of dry yeast that was introduced after active dry yeast in the 1970s. It is made using a similar process as active dry yeast, although is dried more quickly. As you can see, this yeast is also milled into finer particles. Because of this, it dissolves faster and activates quickly. But unlike active dry yeast, instant yeast doesn't have to be proofed first; it can be mixed straight into the dry ingredients with the same result. This yeast also gives you two separate rises and it can be used interchangeably with active dry yeast.
So that the yeast has food to grow.
Yeast like to grow in warm and moist conditions.
What is in yeast to cause it to rise
Yeast is a living organism and thus requires nutrition. In soda, there are sugars and other nutrients not present in water which promote the growth of yeast.
No, yeast infections are not thought to be sexually transmitted.