Q6 / 180 · JIPMER 2015 · Botany

Chlorosis is produced in the leaves due to the deficiency of $\mathrm{Fe}, \mathrm{Mg}, \mathrm{Mn}, \mathrm{S}$ or N of these essential elements, those that are exclusive constituents of chlorophyll molecule are

  • A
    $\mathrm{Fe}, \mathrm{S}$
  • B
    $\mathrm{N}, \mathrm{S}$
  • C
    $\mathrm{Mg}, \mathrm{S}$
  • Correct answer
    D
    $\mathrm{Mg}, \mathrm{N}$

Solution

Magnesium is present in the central position of tetrapyrrole ring of the chlorophyll molecule. Porphyrin is a cyclic tetrapyrrole ring made up of four nitrogen containing pyrrole rings arranged in a cyclic fashion in the chlorophyll molecule.

Hence, the correct answer is option: 'D'.

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