Yeast is the ingredient used in baking that causes the dough to rise.
Baking Powder.
No, yeast and baking powder are not the same ingredient used in baking. Yeast is a living organism that produces carbon dioxide gas to help dough rise, while baking powder is a chemical leavening agent that also helps dough rise but does not require time to ferment.
Cookie dough recipes generally call for either baking soda or baking powder, which create gas that expands and causes the dough to rise while baking.
To rise dough effectively for baking, follow these steps: Knead the dough thoroughly to develop gluten. Place the dough in a warm, draft-free area to rise. Cover the dough with a damp cloth or plastic wrap to prevent it from drying out. Allow the dough to rise until it has doubled in size. Punch down the dough to release air bubbles before shaping and baking.
Baker's yeast is a type of fungus that is used in baking to help dough rise. It works by consuming sugars in the dough and producing carbon dioxide gas, which causes the dough to expand and become light and airy.
Baking powder reduces density. The action of the baking powder produces gas that causes the product to rise, making the dough or batter less dense.
The yeast consumes the natural sugars in the dough and causes bubbles to form. This causes the dough to rise. It's being blown up by the yeast.
No, baking soda cannot replace baking powder in all recipes because baking powder includes a acidic ingredient along with baking soda and certain salts that cause batter or dough to rise. Baking soda is purely alkaline, and requires the addition of some type of acidic ingredient in the recipe to produce the proper rise. Different recipes are formulated for either baking soda or baking powder.I suppose you could, but the recipe will probably taste terrible - and the crust won't rise.
Yeast.
No, all-purpose flour does not contain yeast. Yeast is a separate ingredient that is added to flour to make dough rise when baking.
Carbon dioxide
Yes