In what organelle do the Kreb’s cycle snd the electron chain take place?

The Krebs cycle takes place in the mitochondria, while the electron transport chain also occurs in the inner mitochondrial membrane.

The Krebs cycle, also known as the citric acid cycle, and the electron transport chain both take place in the mitochondria of eukaryotic cells. These processes are key components of cellular respiration, which is responsible for producing most of the ATP (adenosine triphosphate) molecules needed for cellular energy. The mitochondria are often referred to as the "powerhouses" of the cell because of their role in energy production.