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Formation of ATP in photosynthesis and respiration is an oxidation process which utilises the energy from

1. Cytochromes
2. Ferredoxin
3. Electrons
4. Carbon dioxide

Correct answer: Electrons

Solution

In both photosynthesis and respiration, ATP formation is linked to electron transport. As electrons move through carriers, their released energy is used to pump protons and create the gradient that drives ATP synthase.

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