Q

Glucose in the cytoplasm is broken down into pyruvic acid. By which process is this pyruvic acid converted into ethanol and carbon dioxide?

RRB Ministerial & Isolated Categories (Librarian); RRB Paramedical (Stage-II) 12/09/2025 (Shift-I); 30/04/2025 (Shift-III) 2025
✓ Answer: A Yeast through fermentation
Yeast converts pyruvate into ethanol and carbon dioxide during alcoholic fermentation in the absence of oxygen. Options B and C are identical in the source.