Multiple choice A single cycle of Krebs cycle produces 1 FADH2, 3 NADH2 & 1 ATP 1 FADH2, 4 NADH2 & 1 ATP 1 FADH2, 2 NADH2 & 1 ATP 1 FADH2, 3 NADH2 & 2 ATP Reveal answer Fill a bubble to check yourself A Correct answer Explanation In one turn of the Krebs cycle, the oxidation of acetyl-CoA produces 3 NADH, 1 FADH2, and 1 ATP (or GTP).