Question

Study the A, B and C equations given below and identify the correct match.
A. C6H12O6 + 2NAD + 2ADP + 2Pi → 2C2H4O3 + 2ATP + 2NADH + 2H+
B. Pyruvic acid + 4NAD + FAD + 2H2O + ADP + Pi → 3CO2 + 4NADH + 4H+ + ATP + FADH2
C.

• A. A-Glycolysis, B-Fermentation, C- Kreb's cycle
• B. A- Kreb's cycle, B-Fermentation, C-Glycolysis
• C. A- Kreb's cycle, B-Glycolysis, C-Fermentation
• D. A- Glycolysis, B- Kreb's cycle, C-Fermentation

Hint:

Understand the three major steps: Glycolysis (cytoplasm, ATP + NADH), Kreb's cycle (mitochondria, CO2 + NADH + FADH2 + ATP), and Fermentation (anaerobic, regenerates NAD+). Memorize equations for faster recall in exams.

Answer 1

The Correct Option is D

Equation A shows breakdown of glucose to pyruvate with net 2 ATP and NADH — this is Glycolysis. Equation B shows oxidation of pyruvate to CO2 and reducing equivalents with ATP generation — this is Kreb's (TCA) cycle. Equation C shows conversion of pyruvate to ethanol and CO2 via NADH — this is Alcoholic Fermentation. Matching each process with its correct equation confirms option 4.