Question

Choose the correct answers from the alternatives given :
In electron transport system, the final acceptor of electrons is

• A. oxygen
• B. cytochrome $a_3$
• C. cytochrome b
• D. $NAD{H}_2$

Answer 1

The correct option is A oxygen

An electron transport system is a series of cytochromes and coenzymes that take part in the passage of electrons to its ultimate acceptor. There are four complexes in ETS where the last protein called cytochrome c will transfer the electron to oxygen, oxygen is the ultimate electron acceptor.

So, the correct option is ' oxygen'.