Question

Correct sequence of electron acceptor in ETC cycle of ATP synthesis is

• A. Cyt $a_1$, a, b, c
• B. Cyt b, c, a , $a_3$
• C. Cyt b, c, $a_3$, a
• D. Cyt c, b, a, $a_3$

Answer 1

The correct option is B Cyt b, c, a , $a_3$

In electron transport chain, ATP is produced by the oxidation and reduction reaction in the mitochondria by the transfer of an electron from one protein complex to another. The electrons are transported from $NA{D}^{+}$ to flavoprotein and then to cytochrome Q. From Cytochrome Q electrons are transferred to Cyt b, Cyt c, Cyt a and Cyt $a^3$.

Thus, the correct answer is option B.