In one turn of the citric acid cycle per acetyl-CoA (excluding NADH produced by pyruvate dehydrogenase), how many molecules of NADH are produced?

In aerobic respiration, one glucose molecule is converted to two molecules of acetyl-CoA that enter the citric acid (Krebs) cycle. How many turns of the citric acid cycle occur per glucose molecule?

In one turn of the citric acid (Krebs) cycle per acetyl-CoA, how many molecules of $F_{AD{H}_2}$ are produced?

In the citric acid (Krebs) cycle, how many molecules of ATP (or GTP, ATP-equivalent) are produced directly by substrate-level phosphorylation per turn of the cycle (per acetyl-CoA)?

In the citric acid (Krebs) cycle, how many ATP molecules are produced directly (as substrate-level phosphorylation) per turn of the cycle for each acetyl-CoA that enters?

For each turn of the citric acid cycle per acetyl-CoA oxidized, how many molecules of NADH are produced?

In one turn of the citric acid (Krebs) cycle per acetyl-CoA (not counting oxidative phosphorylation from NADH and FADH2), how many ATP equivalents are produced directly by substrate-level phosphorylation?

In cellular respiration, what is the main function of the Krebs (citric acid) cycle?

In one turn of the citric acid (Krebs) cycle per acetyl-CoA, how many molecules of $F_A{D}_2$ are produced?