NEET · BiologyMedium
Which of the following statements correctly describes the role of the cytochrome complex in the electron transport chain?
- A.It directly reduces to
- B.It pumps protons from the stroma into the thylakoid lumen
- C.It transfers electrons from Photosystem I to Photosystem II
- D.It is the site of water photolysis
Show correct answer & step-by-step solution
Correct answer: B — It pumps protons from the stroma into the thylakoid lumen
Solution
- The cytochrome complex receives electrons from plastoquinone.
- As electrons pass through the complex, energy is used to translocate protons across the thylakoid membrane.
- This process contributes to the proton gradient required for ATP synthesis.
- Hence the answer is (B).
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