Clostridium and Escherichia coli are both well-known genera of rod-shaped bacteria, but they are classified into different groups based on their peptidoglycan content.If Clostridium stains purple during a Gram stain test, then we know that E.coli is
A) an archaeon.
B) Gram-positive.
C) a eukaryote.
D) Gram-negative.
E) a spirochete.

Question

Quizplus · Accepted Answer

If Clostridium stains purple during a Gram stain test, it means that it is Gram-positive. Therefore, E.coli, which is classified into a different group based on its peptidoglycan content, is likely Gram-negative.

Clostridium and Escherichia Coli Are Both Well-Known Genera of Rod-Shaped