What Trait Do All Cells on Earth NOT Have in Common

Question

What trait do all cells on Earth NOT have in common?
A) double-stranded DNA
B) cell wall of varying composition
C) universal gene code, common ancestral rRNAs, and elongation factors
D) common ancestral functional domains in proteins
E) cytoplasm, an aqueous compartment enclosed by a membrane

Accepted Answer

Not all cells on Earth have a cell wall, and even among cells that do, the composition of the cell wall can vary widely. For example, plant cells have a cell wall made of cellulose, while bacterial cells have a cell wall made of peptidoglycan.