Multiple choice

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

  1. Chloroplasts

  2. Cytochromes

  3. Movement of H+ into the thylakoid space

  4. Absorption of solar energy

  5. Formation of ATP
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The absorption of solar energy is performed by pigments (like chlorophyll) in the photosystems, not by the electron transport system itself, which is involved in moving electrons and pumping protons.

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