Question

Sulphate ester are present in the wall of _______.

• A. Ectocarpus and Dictyota
• B. Gelidium and Gracilaria
• C. Ectocarpus and Sargassum
• D. Spirogyra and Chara

Answer 1

Answer: (B)

Gelidium and Gracilaria

Polysaccharides whose monomers are esterized to sulfuric acid residues are called sulfonated galactans. Sulfonated galactans are typical for many red algae, depending on their origin are they called agarose, carrageenan, porphyrin, and furan.

So the correct answer is "Gelidium and Gracilaria".