Yeast is a microbe that uses simple carbohydrates to produce ______ in a chemical reaction.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. carbon dioxide.
Yeast is a remarkable microbe that uses simple carbohydrates as a food source to produce carbon dioxide in a chemical reaction called fermentation. Specifically, in the absence of oxygen (anaerobic conditions), yeast breaks down sugars like glucose into ethanol (alcohol) and carbon dioxide gas. This release of carbon dioxide is what makes bread dough rise and gives carbonation to beverages. This metabolic process is fundamental to baking, brewing, and winemaking industries.