There are several types of yeast. Nutritional yeast has protein, dietary fiber, and carbohydrates. Baking or leavening yeast has some of these as well but less. Check out related links for a nutrition table for leavening yeast.
Brewers yeast is added to pet food for its nutritional value, since it is a good source of protein and several of the B vitamins. Bakers yeast would not provide the same nutritional benefits, so it should not be substituted for brewers yeast.
no value
rule of yeast
Yeast cannot produce their own foods. The yeast do not have chlorophyll. Yeast must rely on other ways and sources to get food. Yeast mostly feed on sugar.
yeast is a consumer
Yeast is used in the food industry as it is used a lot in bread and some cakes. so your sandwiches that you are eating is from a food industry that uses yeast.
This depends on the food - breads, beers and any fermented food must have yeast in it as the yeast is what does the fermenting. However, in a non-fermented food, a yeast could be a biological contaminant.
Nutritional yeast is special because it is a deactivated yeast which is sold in stores as a food product. It is a popular health food, especially for vegetarians.
So that the yeast has food to grow.
No. Yeast infections in people are caused by a completely different organizm from the yeast used in food.
The heat provides energy for the enzymes in the yeast to work. If the water is to hot however, the enzymes will be denatured, and the yeast will not grow.
Because yeast needs to have food just like us to grow, and sugar is that food.