Question

In the absence of oxygen, glucose is converted to ethanol in ____ .

• A. Plants
• B. Animals
• C. Yeast
• D. Lactobacillus

Answer 1

The Correct Option is C

To solve the problem, we need to identify in which organism glucose is converted to ethanol in the absence of oxygen.

1. Understanding Anaerobic Respiration:
In the absence of oxygen, certain organisms perform anaerobic respiration (fermentation). The main products differ among organisms:

• Plants: Typically produce ethanol and carbon dioxide during anaerobic conditions (e.g., roots in waterlogged soil).
• Animals: Produce lactic acid, not ethanol, under anaerobic conditions.
• Yeast: Converts glucose into ethanol and carbon dioxide during alcoholic fermentation.
• Lactobacillus: Produces lactic acid, not ethanol.

2. Confirming the Correct Answer:
Yeast specifically converts glucose into ethanol and carbon dioxide during anaerobic respiration (alcoholic fermentation).

Final Answer:
Glucose is converted to ethanol in Yeast (Option A).