Which gas is produced by yeast when it ferments sugar in an anaerobic process?

Prepare for the NLN PAX Science Exam with flashcards and multiple choice questions. Each question includes hints and detailed explanations to boost your confidence and exam readiness.

Multiple Choice

Which gas is produced by yeast when it ferments sugar in an anaerobic process?

Explanation:
When yeast ferment sugar without oxygen, it shifts from aerobic pathways to fermentation, splitting glucose into ethanol and carbon dioxide. The gas released in this process is carbon dioxide, which is why you see bubbling in dough or in fermenting beverages. Oxygen isn’t produced during fermentation, and nitrogen and hydrogen aren’t byproducts of this yeast process.

When yeast ferment sugar without oxygen, it shifts from aerobic pathways to fermentation, splitting glucose into ethanol and carbon dioxide. The gas released in this process is carbon dioxide, which is why you see bubbling in dough or in fermenting beverages. Oxygen isn’t produced during fermentation, and nitrogen and hydrogen aren’t byproducts of this yeast process.

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