Two molecules of acetyl CoA form . . . . . . after entering the Krebs cycle.

$TCA$ cycle is named after

How many $ATP$ molecules are formed by oxidative phosphorylation from $NADH$ produced during a single Krebs cycle?

When $1$ molecule of pyruvic acid passes through the process of the Krebs cycle,$a$ molecules of $CO_2$ are released and at $b$ different stages $2H^+$ and $c$ electrons are released. Identify $a, b, c$.

The enzyme ..... is used to catalyze the condensation of an acetyl group with oxaloacetic acid to yield citric acid.

All enzymes of the $TCA$ cycle are found in the mitochondrial matrix. Exceptionally, one enzyme is located on the inner mitochondrial membrane in eukaryotes and in the cytoplasm in prokaryotes. Identify this enzyme.