Which statement describes the consequence of mitochondrial dysfunction?

• A. Increased ATP production
• B. Enhanced mitochondrial biogenesis
• C. Increased oxygen utilization
• D. Inhibition of ATP production

Answer: (D)

Mitochondria provide the cell’s energy by producing ATP through oxidative phosphorylation. When they don’t function properly, this process slows or stops, so ATP production drops. The resulting energy shortfall affects any energy-demanding cellular activities and is a common consequence of mitochondrial dysfunction.

Increased ATP production would require healthy, functioning mitochondria, not dysfunction. Enhanced mitochondrial biogenesis can occur as an adaptive attempt to compensate for energy stress, but it isn’t the immediate consequence of dysfunctional mitochondria. Increased oxygen utilization isn’t a direct or reliable result of dysfunction either, since impairment of the electron transport chain often reduces efficient use of oxygen for ATP synthesis.