The enzyme that converts glucose to ethyl alcohol is?

Step 1: Analyze the question The question asks which enzyme changes glucose into ethyl alcohol (ethanol). This process is fermentation.

Step 2: Explain the concept Fermentation of glucose is carried out by yeast, which contains a group of enzymes called zymase.

C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂ (in the presence of zymase)

Step 3: Check each option

• A. Maltase: converts maltose to glucose.
• B. Zymase: converts glucose to ethanol and carbon dioxide. ✔
• C. Diastase: converts starch to maltose. (The option spells it "Diatase", but it refers to diastase.)
• D. Invertase: converts sucrose to glucose and fructose (invert sugar).

Step 4: Answer The correct option is B, zymase.

Tip: Remember the chain used in brewing and palm wine fermentation: Starch → (diastase) → Maltose → (maltase) → Glucose → (zymase) → Ethanol + CO₂ Sucrose → (invertase) → Glucose + Fructose

"Zymase = Zero sugar left, alcohol made."