Which Organism Has a Periplasmic Space Containing Membrane Vesicles

Question

Which organism has a periplasmic space containing membrane vesicles?
A) Desulfurococcus sp.
B) Ignicoccus sp.
C) Methanosarcina sp.
D) Methanothermus sp.
E) Pyrodictium sp.

Accepted Answer

Ignicoccus sp. has a periplasmic space containing membrane vesicles, which are believed to play a role in DNA exchange between cells. Desulfurococcus sp., Methanosarcina sp., Methanothermus sp., and Pyrodictium sp. do not have this feature.