The human mitochondrial genomes code for 37 genes but mitochondria produce only 13 proteins.   What would most likely account for mitochondrial genomes having more genes than needed to code for the proteins produced?   A.  Several genes have been inactivated over evolutionary time and no longer code for proteins.   B.  Several genes are coded on both the top and bottom strands of DNA. Therefore, they code for the same proteins.   C.  Several genes code for products that are not translated.   D.  Several genes, and the proteins they code for, are of viral origin. They are not human mitochondrial genes.

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Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.