In order to determine whether a cell contains mitochondria a scientist should?

To determine whether a cell contains mitochondria, a scientist should perform a microscopy technique, such as fluorescence microscopy, using specific stains that bind to mitochondrial components, like mitochondrial DNA or proteins. Alternatively, they could use electron microscopy for a more detailed view of the cell's ultrastructure. Additionally, isolating cell fractions and conducting biochemical assays to measure mitochondrial activity can provide further confirmation of their presence.