Question

Special type of red pigment present in the eye-spot of Euglena and Crustacea is called (1)Phycoerythrin (2)Astaxanthin (3)Carotene (4)Xanthophyll

Answer 1

Answer:

Special type of red pigment present in the eye-spot of Euglena and Crustacea is called 2) Astaxanthin

Answer 2

Concept: Biological classification
To find: The special red pigment present in the eye spot of euglena and crustacea.
Answer: The correct answer is option (2) i.e Astaxanthin.
Explanation:
•Astaxanthin is a lipid-soluble pigment.
•It's reddish colour is due to the extended chain of conjugated double bonds at the centre of the compound.
•Both the organism's eye spot perceive the stimulus of light. It help in directing the organism towards the optimum light source.
•The light-sensitive region apparently influences flagellar motion in such a manner that the organisms moves toward light.
Thus, Astaxanthin is a special eye spot pigment present in mostly red marine organisms.
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