Which photosynthetic bacteria possess both PS I and PS II?

A. Purple sulphur bacteria

B. Cyanobacteria

C. Purple nonsulphur bacteria

D. Green sulphur bacteria

Answer: Option B

Solution(By Examveda Team)

Cyanobacteria photosynthetic bacteria possess both PS I and PS II.
Cyanobacteria are photosynthetic microorganisms that are abundant in nature.
There are two types of photosystems in cyanobacteria, algae, and higher plants, called photosystem I (PSI, plastocyanin-ferredoxin oxidoreductase) and photosystem II (PSII, water-plastoquinone oxidoreductase), both of which are multisubunit membrane complexes.