Which element is essential as electron carrier?

Iron

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Potassium

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Zinc

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Calcium

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Solution

The correct option is A Iron
Iron is a constituent of ferredoxin and cytochrome which are involved in the transfer of electrons in a number of metabolic processes where ${Fe}^{+ 2}$ gets oxidised to ${Fe}^{+ 3}$ reversibly to release an electron.
It activates catalase enzyme. Catalase enzyme is essential in protecting cells from Reactive Oxygen Species (ROS).
Iron is also a constituent of the photosynthetic pigment chlorophyll.

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