Which Group of Microorganisms Would the Calvin Cycle LEAST Likely

Question

Which group of microorganisms would the Calvin cycle LEAST likely be found in?
A) purple Bacteria
B) chemolithotrophic Bacteria
C) cyanobacteria
D) anoxygenic Chloroflexus

Accepted Answer

The Calvin cycle is primarily found in organisms that perform oxygenic photosynthesis, which includes cyanobacteria and purple bacteria. Chemolithotrophic bacteria do not perform photosynthesis, so they would not use the Calvin cycle. Anoxygenic Chloroflexus also do not perform oxygenic photosynthesis and therefore are less likely to use the Calvin cycle.