Recent studies have shown that some Clostridia species have peptidoglycan between an inner and outer membrane,and were therefore properly reclassed as Gram-negative because of their unrelatedness.

Question

Quizplus · Accepted Answer

Clostridia species are classified as Gram-positive bacteria due to their thick peptidoglycan layer and lack of an outer membrane, not as Gram-negative. The classification into Gram-positive or Gram-negative is based on cell wall structure, not on the presence of peptidoglycan alone.

Recent Studies Have Shown That Some Clostridia Species Have Peptidoglycan