Phytochrome is a

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(D) : Phytochrome is a chromoprotein,a plant pigment that can detect the presence or absence of light. It is involved in regulating many processes lin

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chromoprotein

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(D) : Phytochrome is a chromoprotein,a plant pigment that can detect the presence or absence of light. It is involved in regulating many processes linked to day length (photoperiod),such as seed germination and the initiation of flowering.It consists of a light-detecting portion,called a chromophore,linked to a protein moiety.It exists in two interconvertible forms,$Pr$ and $Pfr$,which possess different physical and chemical properties.

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