Suppose you were to add the uncoupler dinitrophenol DNP to a

Suppose you were to add the uncoupler dinitrophenol (DNP) to a preparation of chloroplasts carrying out photosynthesis. What is the effect?

Solution

2,4-Dinitrophenol (DNP), C6H4N2O5, is an inhibitor of efficient energy (ATP) production in cells with mitochondria. It uncouples oxidative phosphorylation by carrying protons across the mitochondrial membrane, leading to a rapid consumption of energy without generation of ATP. Dinitrophenols as a class of compounds, of which there are six members, do not occur naturally but are all manufactured compounds

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