Which gas is responsible for fermentation?

Fermentation is a metabolic process where microorganisms like yeast convert sugars into other products, often in the absence of oxygen. During alcoholic fermentation, yeast breaks down glucose into ethanol and carbon dioxide.

• Correct Option A: Carbon Dioxide is the gas produced during fermentation, responsible for the bubbles in bread dough and carbonated beverages.
• Option B: Nitrogen is an inert gas and does not participate in the chemical reactions of fermentation.
• Option C: Oxygen is generally absent or limited during fermentation, as many fermentation processes are anaerobic. Its presence would typically lead to aerobic respiration.
• Option D: None is incorrect because carbon dioxide is indeed the gas responsible.