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Genetics and Genomics

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Mitochondrial Genomes

GENES-F2RRQT

Mitochondria play an important role in providing energy for the cell. Interestingly the mitochondria contain its own genome, separate from the nuclear genome of the cell.

As would be expected some of those genes code for proteins involved in oxidative phosphorylation, the process by which the mitochondria produces energy.

However, looking at humans we find that the mitochondria encode thirteen genes involved in oxidative phosphorylation. Perhaps surprisingly we find that it encodes twenty-four genes of another function. Looking at other species we find that the numbers are similar.

Given how that the mitochondria are theorized to be derived from an absorbed bacterial cell, what is the MOST likely function of these genes?

A

Genes involved​ in DNA replication.

B

Genes involved in DNA translation.

C

Genes involved in DNA transcription.

D

Genes involved in DNA repair​.