NEET BIOLOGY

Detailed explanation-1: -Alginic acid is a naturally occurring hydrophilic colloidal polysaccharide obtained from the various species of brown seaweed (Phaeophyceae). It is a linear copolymer consisting mainly of residues of b-1, 4-linked D-mannuronic acid and a-1, 4-linked L-glucuronic acid.

Detailed explanation-2: -► In recent times, phaeophyta are extensively exploited for the extraction of alginic acid, which is used for deriving alginate, a major colloidal gel used as a stabilizer, emulsifier or binder in many industrial applications. ► Apart from alginic acid, agar, carrageenans are also derived from phaeophyta.

Detailed explanation-3: -Alginic acid, also called algin or alginate, is an anionic polysaccharide distributed widely in the cell walls of brown algae, including Laminaria and Ascophyllum species. It is formed by linear block copolymerization of d-mannuronic acid and l-guluronic acid.