Jan 28, 2019 · Diagram Of The Kreb Cycle. It is also known as TriCarboxylic Acid (TCA) cycle. In prokaryotic cells, the citric acid cycle occurs in the cytoplasm; in eukaryotic cells, the citric. a) Krebs cycle ccurs in matrix of mitochondria. The diagram below is a very simple outline of the Krebs Cycle showing the removal of CO2, and the making of 3.