an experiment was conducted in which isolated thylakoids from a plant were made acidic by soaking them in a solution at ph 4. after the intra-thylakoid space had reached a ph of 4, the thylakoids were then transferred to a solution with a ph of 8. when the ph 8 solution was tested later, large amounts of atp were found in the extra-thylakoid space even though the beakers that contained the thylakoids were kept in a dark room. how did this happen and why

Respuesta :

The isolated chloroplast will make ATP in the above experiment where isolated thylakoids were made acidic at ph4 and then transferred to ph8.

The acidic lumen of the thylakoid will have greater concentration of H+ ions. when these ions are passed to basic pH of 8 then H+ ions tend to go to outside due to their concentration gradient, when is greater in lumen and lesser in the surrounding. the thylakoid holds ATP synthases that uses proton motive force H+ ions and will make the ATP. Hence an isolated chloroplast is capable of synthesizing ATP when the lumen is made acidic and the outer medium is made alkaline.

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