Question

Alginic acid is produced by

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

Answer 1

Answer: (D)

Brown alga

• 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.
• It is sold in filamentous, granular or powdered forms.
• Hence the correct option is D.