Respiration In Plants Question 107

Question: In an electron transport chain in terminal oxidation the cytochrome which donates electrons to $ O_2 $ is [CPMT 1990]

Options:

A) Cytochrome b

B) Cytochrome c

C) Cytochrome $ a_3 $

D) Cytochrome a

Show Answer

Answer:

Correct Answer: C

Solution:

Cytochrome a3 is terminal cytochrome of ETC.

It has $ F{e^{+++}} $ and $ C{u^{++}} $ both.

With $ F{e^{+++}} $ , it picks up electrons and through $ C{u^{+}} $ it passes electrons to oxygen.