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(C) Cytochromes are iron-containing hemoproteins that act as electron carriers in the electron transport chain $(ETC)$.In photosynthesis, cytochromes

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Cytochromes

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(C) Cytochromes are iron-containing hemoproteins that act as electron carriers in the electron transport chain $(ETC)$.In photosynthesis, cytochromes (like $Cytochrome \, b_6f$) are present in the thylakoid membrane to facilitate electron flow.In cellular respiration, cytochromes (like $Cytochrome \, c$, $a$, and $a_3$) are essential components of the inner mitochondrial membrane for oxidative phosphorylation.Therefore, cytochromes are required in both processes.

Column $I$	Column $II$
$i.$ $FADH_2$	$a.$ Complex $III$
$ii.$ Ubiquinol	$b.$ Complex $IV$
$iii.$ $NADH + H^{+}$	$c.$ Complex $II$
$iv.$ Cytochrome $C$	$d.$ Complex $I$

Both respiration and photosynthesis require ......... .

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