Question

Scientists divided thw kingdom Monera into two groups, the Archaebacteria and the Eubacteria. Advances in biochemistry and genetics helped to separate organisms into the two prokaryotic kingdoms. Compare and contrast the two prokaryotic kingdoms. What is one major difference that is apparent? A) Archabacteria are the only organisms on Earth that do not contain DNA. B) The chemical composition of the cell walls of each in the two kingdoms varies. C) Archaebacteria are much smaller than any known organisms on Earth or in the history of Earth. D) Archaebeceria are capable of producing their own food without chloroplasts, using mitochondria instead.

Answer 1

The most appropriate answer would be B) The chemical composition of the cell walls of each in the two kingdoms varies.

The cell wall of the eubacteria is mainly composed of peptidoglycan. It is a type of polymer made up of sugars and amino acids. The sugar component usually consists of alternate units of N-acetylmuramic acid (NAM) and N-acetylglucosamine (NAG). The sugar polymers are cross-linked with the help of a peptide chain.

In contrast, the cell wall of archaebacteria does not contain peptidoglycan. They contain other types of polysaccharides and proteins