For each acetyl-CoA entering the Krebs cycle, the direct yield (per turn) is
- A
1 NADH, 1 FADH₂, 1 ATP, 1 CO₂
- Bcheck_circle
3 NADH, 1 FADH₂, 1 GTP/ATP, 2 CO₂
- C
2 NADH, 2 FADH₂, 2 GTP/ATP, 2 CO₂
- D
4 NADH, 0 FADH₂, 1 ATP, 3 CO₂
Explanation
One turn produces 3 NADH (isocitrate→α-KG, α-KG→succinyl-CoA, malate→OAA), 1 FADH₂ (succinate→fumarate), 1 GTP (substrate- level), and releases 2 CO₂.