yeast.
The ingredient in bread that produces carbon dioxide is yeast.
Yeast!
Yeast produces carbon dioxide when they eat which makes those tiny wholes in bread. As yeast produces the carbon dioxide the bread expands and with all the ingredients in the dough of the bread it creates the bread we eat.
Carbon dioxide
carbon dioxide
carbon dioxide
When glucose is added to yeast in solution, the enzymes inside it turn the mixture into ethanol and carbon dioxide, so, for your question, carbon dioxide. It also respires normally (aerobically) and then too produces carbon dioxide.
Carbon dioxide
Bread rises in the oven due to the process of fermentation and the release of carbon dioxide gas by yeast. The yeast consumes sugars in the dough and produces carbon dioxide, which gets trapped in the gluten structure of the dough, causing it to expand and rise.
The product of anaerobic respiration that causes bread to rise and produces alcohol bubbles is carbon dioxide. In the process of fermentation, yeast converts sugars into alcohol and carbon dioxide. The carbon dioxide gas gets trapped in the dough, causing it to expand and rise, while the alcohol contributes to the flavor of the bread.
Yeast produces CO2 gas and sometimes ethenol when it metabolizes sugar.
In yeasts, fermentation results in the production of ethanol and carbon dioxide – which can be used in food processing: Bread – Carbon dioxide causes dough to rise (leavening), the ethanol evaporates during baking.