please check my answer! thanks.
What are key markers for the identification of Bacteria?

Peptidoglycan in cell membranes, ether-linked fatty acids, Special transcription DNA
Special RNA polymerase, peptidoglycan in cell walls, ester-linked fatty acids
Cellulose in cell membranes, ester-linked lipids in cell walls, special transcription DNA
Special RNA polymerase, peptidoglycan in cell membranes, chitin and cellulose cell walls

I chose B.. am I right??