The bacterium E.coli
A) is a normal inhabitant of the mammalian gut.
B) has some mutant strains that produce toxins and cause disease.
C) is grown in laboratories around the world.
D) produces vitamin K.
E) has all of these characteristics.

Question

Quizplus · Accepted Answer

E.coli is a normal inhabitant of the mammalian gut, but some mutant strains can produce toxins and cause disease. It is grown in laboratories around the world and produces vitamin K. Therefore, all of these statements are true and the best choice is E.

The Bacterium E.coli