In a young boy experiencing constant fatigue due to a metabolic disease, the organelles most likely involved are mitochondria. Mitochondria are responsible for producing adenosine triphosphate (ATP), the energy currency of the cell, through cellular respiration. Dysfunction in mitochondrial function can lead to insufficient energy production, resulting in fatigue and other metabolic issues. Additionally, this could affect various tissues, especially those with high energy demands, such as muscle and brain cells.
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