All of the following are examples of substances found in bacteria or archaea except:
Correct answer: D. Chitin
- A. Peptidoglycans
- B. Flagellin
- C. Bacteriorhodopsin
- D. Chitin
- E. Phycobilins
Explanation
Chitin is a polysaccharide found in the exoskeleton of arthropods and in the cell walls of fungi. Flagellin is the protein of bacterial flagella. Bacteriorhodopsin is a photosynthetic pigment found in extreme halophiles. Phycobilins are photosynthetic pigments found in cyanobacteria (as well as in red algae).
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