Question

Which of the following is not associated with the electron transport system ?

• A. Formation of ATP
• B. Movement of $H^{+}$ into the thylakoid space
• C. Cytochromes
• D. Absorption of solar energy

Answer 1

The correct option is D Absorption of solar energy

The electron transport chain involves electron acceptors such as cytochromes present as complexes that can accept electrons in exchange of H+ and transfer to further components with higher reduction potential. This system further involves an ATP synthase enzyme that can convert the energy derived from a gradient of protons (H+) which cross the inner mitochondrial membrane from the inter-membrane space into the matrix. However, there is no absorption of solar energy in this case.

So, the correct option is, 'Absorption of solar energy'.