Which process describes yeast converting sugar into carbon dioxide and alcohol?

Which process describes yeast converting sugar into carbon dioxide and alcohol?

• A. Lactic acid fermentation
• B. Alcoholic fermentation
• C. Photosynthesis
• D. Habitat

Answer: (B)

Alcoholic fermentation is the process in which yeast, in the absence of oxygen, converts sugars into carbon dioxide and ethanol. It starts with glycolysis to turn glucose into pyruvate, then pyruvate is transformed into acetaldehyde and finally into ethanol, releasing CO2 along the way. This pathway also regenerates NAD+, allowing glycolysis to continue and providing energy for the yeast. This description matches sugar being turned into CO2 and alcohol. Lactic acid fermentation would produce lactic acid instead of ethanol and CO2, photosynthesis builds sugars using light energy, and habitat is not a metabolic process.

Alcoholic fermentation is the process in which yeast, in the absence of oxygen, converts sugars into carbon dioxide and ethanol. It starts with glycolysis to turn glucose into pyruvate, then pyruvate is transformed into acetaldehyde and finally into ethanol, releasing CO2 along the way. This pathway also regenerates NAD+, allowing glycolysis to continue and providing energy for the yeast. This description matches sugar being turned into CO2 and alcohol. Lactic acid fermentation would produce lactic acid instead of ethanol and CO2, photosynthesis builds sugars using light energy, and habitat is not a metabolic process.