Most are made using bakers yeast as leavening, however some loaves (called "sourdoughs") are made without any added yeast whatsoever.
Sourdough breads are still made from flour, water, yeast, and bacteria
No, not all bread contains yeast. Some breads, like unleavened bread, are made without yeast. Yeast is used in many bread recipes to help the dough rise and create a light, fluffy texture, but there are also breads that are made without yeast, such as flatbreads or quick breads.
Yes. All "quick breads" are made without yeast, including (American) muffins, cornbread, fruit and nut breads and biscuits. Many flat breads also are made without yeast, including matzo, chapattis and pancakes.
Yeast.
Breads, rolls, & doughnuts
a yeast dough uses yeast and a quick bread uses baking powder or baking soda.
Gluten is developed in yeast breads when the flour is mixed with water.
In a very hot oven with steam injectors
YeastGlutenBake
Yeast is a natural fungus with starts to grow when temperature rises, therefore making bread larger (for example). Yeast is most commonly used in bread making, helping it to rise.
No it is not. Yeast is simply a common ingrediant in breads.
Sorta. Many breads use yeast, to puff up and get a bit fluffy. And yeast is a micro organism.