Question

The last or terminal cytochrome in respiratory chain is
or
In an electron transport chain in terminal oxidation the cytochrome which donates electrons to `O_(2)` is
A. Cyt b
B. Cyt `a_(3)`
C. Cyt a
D. Cyt c

Answer 1

Correct Answer - B
Cytochrome `alpha_(3)` is terminal cytochrome of ETC. it has `Fe^(+++)` and `Cu^(++)` both. With `Fe^(+++)`, it picks up electrons and through `Cu^(+)` it passes electrons to oxygen.