Photosynthesis Question 14
14. Which element is located at the centre of the porphyrin ring in chlorophyll ?
(a) Manganese
(b) Calcium
(c) Magnesium
(d) Potassium
Show Answer
Answer : c
Hints & Solution
(c) A non ionic $Mg$ atom is held in the centre of porphyrin (of chlorophyll) held by nitrogen atom of pyrrole ring. Magnesium $(Mg)$ is needed by all crops to help capture the sun’s energy for growth and production through photosynthesis. Photosynthesis takes place in chlorophyll, the green pigment in plants, and magnesium is the central atom of the chlorophyll molecule, with each molecule containing $6.7 %$ magnesium.
