Question

Algal cell wall is made up of which substance?

• A. Mannans and Galactans
• B. Cellulose
• C. Calcium Carbonate
• D. All of the above

Answer 1

The correct option is D All of the above

Algae have cell walls that include either polysaccharides such as cellulose (a glucan) or a number of glycoproteins, or both, much like plants. Algal cell wall is made up of cellulose, galactans, mannas and minerals (CaCO3).

The primary cell wall of land plants is composed of the polysaccharides cellulose, hemicelluloses, and pectin. Many green algae, such as Halimeda and the Dasycladales, and some red algae, the Corallinales, encase their cells in a secreted skeleton of calcium carbonate. In each case, the wall is rigid and essentially inorganic. It is the non-living component of cell.

Majorly algae possess cell walls made of glycoproteins and polysaccharides such as carrageenan, cellulose, hemicellulose pectins and agar that are absent from land plants. Algae do have a cell wall that consists of cellulose, Galatians and mannans.
Hence, Algae have cell walls made up of Cellulose, Galactans, Mannans and calcium carbonate.