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

Question

Quizplus · Accepted Answer

Clostridium is classified as Gram-positive because it has a thick peptidoglycan layer in its cell wall that retains the crystal violet dye used in Gram staining, unlike Escherichia coli (E. coli), which is Gram-negative and stains red due to its thin peptidoglycan layer and outer membrane.

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