Keeping some DNA needed by mitochondria in the cell's nucleus provides several advantages. Firstly, it allows for the coordination of gene expression between the nucleus and mitochondria, ensuring efficient functioning of the organelle. Secondly, having a portion of the DNA in the nucleus allows for repair and maintenance of mitochondrial DNA, which is essential for preventing mitochondrial dysfunction. Additionally, if a mutation occurs in the mitochondrial DNA, having a backup copy in the nucleus can act as a safeguard against the loss of critical genetic information.
