You are given a mixed sample of Bacteria and Archaea and asked to identify which more specific groups are present.When you try culturing portions of the sample under different conditions,freshwater cultures at room temperature turn blue-green and cultures in high salt become dark purple.Which groups must be present in the mixed sample?
A) Cyanobacteria and extreme halophiles
B) Extreme halophiles and proteobacteria
C) Proteobacteria and euryachaeota
D) Chlamydias and cyanobacteria
E) Chlamydias and proteobacteria

Question

Quizplus · Accepted Answer

Blue-green pigment is typically indicative of photosynthetic pigments like chlorophyll found in Cyanobacteria, while dark purple pigment indicates the presence of bacteriorhodopsin-like pigments found in extreme halophiles. Therefore, the mixed sample must contain both Cyanobacteria and extreme halophiles.

You Are Given a Mixed Sample of Bacteria and Archaea