The Krebs cycle produces 2 ATP per glucose molecule via substrate-level phosphorylation (1 GTP per acetyl-CoA turn × 2 turns per glucose = 2 GTP/ATP). The cycle primarily produces electron carriers: 6 NADH and 2 FADH₂ per glucose, which generate ~20–22 ATP via oxidative phosphorylation in the ETC. Total aerobic ATP yield per glucose is ~30–32 ATP. The question asks specifically for direct ATP production in the Krebs cycle itself, which is 2.