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NEET Biology Photosynthesis in Higher Plants Question Bank Photosynthetic Apparatus and General

  • question_answer
    The plants growing in dark show yellowing in leaves and elongated internodes, this condition is called as     [BHU 1999]

    A)                 Etiolation

    B)                 Chlorosis

    C)                 Dechlorosis            

    D)                 Dark effect

    Correct Answer: A

    Solution :

                    In Etiolation, chlorophyll (green) converts in protochlorophyll (yellow) in dark, etiolin hormone is formed due to which plants become elongated. \[\underset{\text{(green)}}{\mathop{\text{Chlorophyll}}}\,\underset{\text{Light}}{\overset{\text{Dark}}{\longleftrightarrow}}\underset{\text{(yellow)}}{\mathop{\text{Protochlorophyll}}}\,\text{+2H}\]


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