Question

Which of the following groups of algae produces algin?

(a) Phaeophyceae and Chlorophyceae

(b) Rhodophyceae and Phaeophyceae

(c) Chlorophyceae and Rhodophyceae

(d) Phaeophyceae only

Answer 1

The correct option is: (d) Phaeophyceae only

Explanation:

Alginic acid (or algin or alginate) is an anionic polysaccharide distributed widely in the cell walls of many brown algae (Phaeophyceae). It is a phycocolloid which is obtained commercially from Laminaria, Macrocystis, Nereocystis, Fucus, Sargassum etc.