Which of the Following Is True Regarding Escherichia Coli

Multiple Choice

Which of the following is true regarding Escherichia coli?

A) Most of our understanding about mitosis comes from studies on this model organism.
B) It is a rod-shaped bacterium that can only grow in the gut of humans and other vertebrates.
C) Two strains of E. coli can differ by up to 0.1% in their genomes.
D) E. coli strain K-12 encodes about 4300 proteins.
E) The E. coli (strain K-12) genome is about 430 million nucleotide pairs long.