Question

Which of the following is not true for red algae?

• A. Phycoerythrin, chlorophyll a and d pigments are present
• B. Floridean starch is the stored food
• C. Gelidium and Gracilaria are economically important
• D. Algin and carageenan are found in their cell wall

Answer 1

The correct option is D Algin and carageenan are found in their cell wall

All red algae belong to the class Rhodophyceae. Phycoerythrin, chlorophyll a and d are the pigments that help the red algae to perform photosynthesis. The excess of glucose that is produced during photosynthesis is stored in the form of floridean starch.

Gelidium and Gracilaria are economically important because they are cultivated to extract agar and carageenan which are present in their cell wall.
Algin is present in the cell walls of brown algae or the members of the class Phaeophyceae.