Final answer:
Eukaryotic cell walls are constructed of either polysaccharides, proteins, or both, and their composition varies depending on the organism. For instance, plant cell walls are mainly made of cellulose, while fungal cell walls consist of chitin and proteins.
Step-by-step explanation:
Eukaryotic cell walls are constructed of either polysaccharides, proteins, or both. Unlike bacterial cell walls that contain peptidoglycan, eukaryotic cell walls do not have a rigid structure like that of bacteria. Instead, they vary in composition depending on the organism. For example, plant cell walls are primarily composed of cellulose, while fungal cell walls contain a mixture of chitin and proteins.