Question

Instead of many small ones, why does a cell not have a single giant mitochondrion? How does this relate to the concept of surface area?

Answer 1

A cell often has multiple little mitochondria rather than a single large one, as this structure maximises the total surface area for respiration and energy production. The augmented surface area improves the efficacy of metabolic reactions, making energy production more efficient than in a single huge mitochondrion.