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

In the citric acid (Krebs) cycle, which set of products is generated per acetyl-CoA oxidized (not counting the NADH and FADH2 made later in the electron transport chain)?

In aerobic metabolism, what is the primary function of the citric acid (Krebs) cycle?

Which of the following is NOT produced directly during one turn of the citric acid (Krebs) cycle per acetyl-CoA oxidized?

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

In one turn of the citric acid (Krebs) cycle per acetyl-CoA (excluding ATP from oxidative phosphorylation), what is the direct energy yield in terms of reduced cofactors and substrate-level phosphorylation?

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?