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Question

The microelement which is an integral part of the electron carrier which transfers electrons from cyt-b-f complex to PS- I is a component of

A
Cytochrome- c- oxidase.
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B
IAA oxidase.
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C
Dinitrogenase.
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D
Nitrate reductase.
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Solution

The correct option is A Cytochrome- c- oxidase.
Electron chain transport also known as oxidative phosphorylation is the final aerobic step of the respiratory chain which comprises of series of transfer of electron among the complexes. Cytochrome c oxidase is the terminal complex of electron chain transport. Cytochrome c oxidase is also known as complex IV. It is a large transmembrane protein complex. Cytochrome c oxidase is mostly found in bacteria and the mitochondrion of eukaryotes. It is the last enzyme in the respiratory electron transport chain of mitochondria or bacteria located in the mitochondrial or bacterial membrane.

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