Question

multiple choice question
the genome of a mitochondrion is typically composed of which of the following?

several circular, closed molecules of dna, similar to that in bacteria, but much smaller
a small, linear, molecule of dna that contains the same core genes as a bacterial chromosome
a single, circular, closed molecule of dna, similar to that in bacteria
2 - 5 small, linear dna molecules that contain genes similar to those found in bacteria

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Explanation:

Mitochondrial DNA (mtDNA) is typically a single, circular, closed - loop molecule similar to bacterial DNA. It has its own genetic system and encodes some of the proteins and RNAs necessary for mitochondrial function.

Answer:

A single, circular, closed molecule of DNA, similar to that in bacteria