Q. The deficiencies of micro-nutrients, not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport ?

A) Cu, Mn, Fe
B) Co, Ni, Mo
C) Mn, Co, Ca
D) Ca, X, Na
Explanation

[Solution from source] Iron (in cytochromes and Fe-S proteins), copper (in plastocyanin and cytochrome oxidase) and manganese (in water splitting at PSII) are directly involved in electron carriers. Co, Ni and Mo are needed in nitrogen-related enzymes, and Ca and Na are not electron carriers. Answer (1).

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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