Question

Choose the correct sequence of electron pathway in electron transport system.

• A. Cyt oxidase $\to$ cyt reductase $\to$ succinic hydrogenase $\to$ NADH dehydrogenase
• B. NADH dehydrogenase $\to$ succinic dehydrogenase $\to$ cyt c reductase $\to$ cyt c oxidase $\to O_2$
• C. NADH dehydrogenase $\to$ cyt c reductase $\to$ cyt c oxidase $\to O_2$
• D. Succinic dehydrogenase $\to$ cyt oxidase $\to$ cyt reductase $\to O_2$

Answer 1

The correct option is B NADH dehydrogenase $\to$ succinic dehydrogenase $\to$ cyt c reductase $\to$ cyt c oxidase $\to O_2$

An electron transport chain (ETC) is a series of compounds that transfer electrons from electron donors to electron acceptors via redox reactions, and couples this electron transfer with the transfer of protons (H${}^{+}$ ions) across a membrane. The pathway of electron in the electron transport system is shown in the above figure.

So, the correct option is option B