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Name the photosynthetic pigment which is structurally similar to bile pigment bilirubin?

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Name the photosynthetic pigment which is structurally similar to bile pigment bilirubin?

(a) Chlorophyll

(b) Carotene

(c) Xanthophyll

(d) Phycobilins

The question was posed to me in a job interview.

The doubt is from Photosynthesis topic in section Bioenergetics and Metabolism of Life Sciences

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Correct answer is (d) Phycobilins

For explanation I would say: Phycobilins have non-cyclic, linear tetrapyrroles structure which shows the structural similarity to the bile pigment called bilirubin. This is unique photosynthetic pigment which is covalently bound to water-soluble protein, phycobiliprotein.

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