Which Phylum Contains the Purple Bacteria

Question

Which phylum contains the purple bacteria?
A) cyanobacteria
B) proteobacteria
C) actinobacteria
D) fusobacteria
E) firmicutes

Accepted Answer

Purple bacteria belong to the phylum Proteobacteria, which contains a diverse group of bacteria including many human pathogens. These bacteria are characterized by their purple pigment and their ability to perform photosynthesis using bacteriochlorophyll.