Question

Assume the thylakoid membrane within a chloroplast is punctured so that there is no separation between lumen and stroma of thylakoid. Which of these process would be most affected?

• A. Reduction of $NAD{P}^{+}$
• B. The splitting of water
• C. The flow of electrons from PS - II to PS - I
• D. The synthesis of ATP

Answer 1

The correct option is D The synthesis of ATP

According to chemiosmotic hypothesis (Mitchell 1961) the ATP is synthesized on ATPase complexes located on the non-appressed portions of thylakoid membranes particularly towards margins. Therefore, if the thylakoid membrane within a chloroplast is punctured so that there is no separation between lumen and stroma of thylakoid, synthesis of ATP will be affected the most.