Question

The main purpose of electron transport chain is to

• A. release and utilise energy stored in $NADH + H ^{+}$and $FADH _{2}$
• B. use the intermediate from TCA cycle
• C. breakdown pyruvic acid
• D. All of the above

Answer 1

Answer: (A)

The main purpose of ETC (Electron Transport Chain) is to release and utilise the energy stored in $NADH + H ^{+}$and $FADH _{2}$. This is accomplished when these are oxidised through the electron transport system and the electrons are passed on to $O _{2}$, resulting in the formation of $H _{2} O$.