Question

Alginic acid is a product of

• A. Red algae
• B. Green algae
• C. Blue green algae
• D. Brown algae

Answer 1

The correct option is D Brown algae

Alginic acid, also called as algin or alginate, is an anionic polysaccharide distributed widely in the cell walls of brown algae, where through binding with water it forms a viscous gum. In extracted form, it absorbs water quickly; it is capable of absorbing 200-300 times its own weight in water. Its colour ranges from white to yellowish-brown. It is sold in filamentous, granular or powdered forms.