According to the Endosymbiotic Theory, Early Eukaryotes Acquired the Mitochondrion

question 29

Multiple Choice

According to the endosymbiotic theory, early eukaryotes acquired the mitochondrion from a symbiotic bacterium. What happened to the bacterial genes?

• A) All of the bacterial genes were transferred to the nuclear genome.
• B) All of the bacterial genes still exist and comprise the mitochondrial genome.
• C) All of the bacterial genes still exist and comprise the chloroplast genome.
• D) Some bacterial genes were transferred to the nucleus, some were lost, and some comprise the mitochondrial genome.

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Definitions:

π Network

An extended system of π bonds in a molecule, which can involve multiple atoms contributing p orbitals for delocalized electron sharing.

Cyclobutadiene

A highly reactive, four-carbon cyclic diene that is unstable at room temperature, interesting for its peculiar electronic properties and symmetry.

1,3-Butadiene

A simple conjugated diene with the formula C4H6, important as a monomer in producing synthetic rubber.

AntiAromatic

Compounds that possess cyclic, conjugated systems with 4n π electrons, which destabilize the molecule and make it less stable than expected.