MCAT Question of the Day
    •

    Q:

    		 One theory for the origin of mitochondria and chloroplasts is called the autogenous theory; that the two organelles arose from internal differentiation. Another theory is known as the endosymbiotic theory and posits that the organelles were originally separate organisms and later became engulfed and symbiotic with the larger cell. Which of the following does not provide evidence for the endosymbiotic theory OVER autogenous theory? Choose the BEST answer.
    		 

    A

    		 Cyanobacteria have the most similar gene sequence encoding for ferrodoxin and Cytochrome C to eukaryotic chloroplasts.

    B

    		 Chloroplasts and mitochondria have considerably smaller genomes than free-living bacteria and eukaryotes.

    C

    		 The majority of proteins used by mitochondria and chloroplasts are encoded by DNA inside the eukaryotic nuclei.

    D

    		 Mitochondria and chloroplasts have circular DNA.



    Evolution |
    Subscribe


    Connect

    Questions? We're here to help!

    Ask Us