Where does the $TCA$ cycle take place?

Which enzyme is necessary for the following process?
Pyruvic acid $+ CoA + NAD^+ \rightarrow$ Acetyl $CoA + CO_2 + NADH + H^+$

The mineral activator required for the carboxylase enzymes of the $TCA$ cycle is

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 located in the mitochondrial matrix, except for one which is located in the inner mitochondrial membrane in eukaryotes and in the cytosol in prokaryotes. This enzyme is

Kreb's cycle is also called