Which of the Following Bacteria is Both Photosynthetic and Gram-Positive

Question

Which of the following bacteria is both photosynthetic and Gram-positive?
A)Purple bacteria
B)Green bacteria
C)Heliobacteria
D)Cyanobacteria
E)None of the choices are correct.

Accepted Answer

Heliobacteria are unique among photosynthetic bacteria for being Gram-positive. They contain bacteriochlorophyll g, which is used in their photosynthetic process, distinguishing them from other photosynthetic bacteria which are typically Gram-negative.