Question

In electron transport system, a carrier holds electron at

• A. Higher energy level than the previous carrier
• B. Lower energy level than the previous carrier
• C. Same energy level as the adjacent ones
• D. Initially holds it at higher level but the electron loses energy during its contact with carrier.

Answer 1

Answer: (B)

Lower energy level than the previous carrier

As we know that the electron is negatively charged and is attracted to the positively charged carrier so the components in the electron transport chain and arranged in the manner of their increasing positive potential. As the electron moves from one level to another the energy decreases, so the carrier holds the electron at a lower energy level than the previous carrier because there is a decrease in the energy of the electron.

So, the correct option is 'lower energy level than the previous carrier'