The bacterium that causes botulism disease is harmless until it:
A) is infected by prions.
B) is infected by lytic bacteria.
C) is irradiated by UV radiation.
D) contains a certain prophage DNA.
E) is infected by certain retroviruses.

Question

Quizplus · Accepted Answer

The bacterium that causes botulism, Clostridium botulinum, becomes harmful when it contains a certain prophage DNA. This prophage DNA can produce botulinum toxin, which is responsible for the symptoms of botulism.

The Bacterium That Causes Botulism Disease Is Harmless Until It