The correct net equation for aerobic glycolysis is:
Glucose + 2 ADP + 2 Pi + 2 NAD⁺ → 2 pyruvate + 2 ATP + 2 NADH + 2 H₂O + 4 H⁺.​
Among the given options, this corresponds to option (B).

Understanding aerobic glycolysis

In aerobic conditions, glycolysis converts one molecule of glucose into two molecules of pyruvate, generating a net of 2 ATP and 2 NADH per glucose.​
The balanced net reaction is commonly written as: Glucose + 2 NAD⁺ + 2 ADP + 2 Pi → 2 pyruvate + 2 NADH + 2 H⁺ + 2 ATP + 2 H₂O.​

Analysis of each option

Option (A)

Glucose + 2 ATP → 2 lactate + 2 ADP + 2 Pi

• This option shows lactate as end product, which characterizes anaerobic glycolysis or lactic acid fermentation, not aerobic glycolysis.​

• It also ignores NAD⁺/NADH and water, so the redox balance and mass balance are incomplete; therefore option (A) is incorrect for aerobic glycolysis.​

Option (B)

Glucose + 2 ADP + 2 Pi + 2 NAD⁺ → 2 pyruvate + 2 ATP + 2 NADH + 2 H₂O + 4 H⁺

• This matches the standard balanced net equation for glycolysis under aerobic conditions, where pyruvate is the final product and 2 ATP and 2 NADH are formed per glucose.​

• The inclusion of NAD⁺, NADH, water and protons correctly reflects the oxidation–reduction steps and overall stoichiometry, so option (B) is correct.​

Option (C)

Glucose + 2 ADP + 2 Pi → 2 pyruvate + 2 ATP + 2 H₂O

• This option gives pyruvate and ATP correctly but completely omits NAD⁺ and NADH, which are essential electron carriers in glycolysis.​

• Because the redox cofactors are missing, the equation is not chemically balanced for aerobic glycolysis, making option (C) incorrect.​

Option (D)

Glucose + 2 ADP + 2 Pi + 2 NAD⁺ → 2 lactate + 2 ATP + 2 NADH + 2 H₂O + 4 H⁺

• Here, lactate appears as the final product instead of pyruvate; lactate is typical of anaerobic glycolysis (lactic acid fermentation), not the net reaction of aerobic glycolysis.​

• Although ATP and NADH counts look similar to glycolysis, the presence of lactate as product means pyruvate has already been further reduced, so option (D) represents anaerobic fate of pyruvate and is incorrect for aerobic glycolysis.​

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SEO‑oriented introduction

The net equation for aerobic glycolysis is a frequent MCQ in competitive exams because it tests understanding of energy yield and redox balance in glucose breakdown.​
In aerobic cells, glycolysis converts glucose to pyruvate with a net production of 2 ATP and 2 NADH, and any accurate equation must include ADP, Pi, NAD⁺, water, and protons to reflect this.​

Key exam points about aerobic glycolysis

• Net ATP yield is 2 ATP per glucose at the substrate‑level phosphorylation stage of glycolysis.​

• Under aerobic conditions, pyruvate enters mitochondria for further oxidation, while the 2 NADH produced in glycolysis feed electrons into the electron transport chain to generate additional ATP.​

• Lactate as an end product indicates anaerobic conditions, where NADH is reoxidized to NAD⁺ by reducing pyruvate to lactate, allowing glycolysis to continue without oxygen.​