Question

bacterial cell walls contain peptidoglycan; archaeal cell walls do not.
bacterial cell walls do not contain polysaccharides; archaeal cell walls do not.
bacterial cells have nuclear membranes; archaeal cells do not.
bacterial cells do not have endoplasmic reticulum; archaeal cells do not.

Explanation:

1. Bacteria have peptidoglycan in their cell walls, while archaea lack this component; this is a key distinguishing feature.
2. Both bacterial and archaeal cell walls can contain polysaccharides, so the second statement is incorrect.
3. Both bacteria and archaea are prokaryotes, meaning neither has a nuclear membrane; the third statement is incorrect.
4. Both bacteria and archaea are prokaryotes, so neither has an endoplasmic reticulum; the fourth statement is incorrect.

Answer:

A. Bacterial cell walls contain peptidoglycan; Archaeal cell walls do not.