Arrey, the endosymbiotic theory is just that mitochondria were free bacteria long ago, swallowed by a bigger cell, and they stayed inside yaar. And it makes ATP through that respiration cycle in its inner membrane—Krebs cycle, electron transport, all that. But honestly, the diagram in my book looks just like the power generator at the tailor shop—it's a separate unit inside my room that suddenly stops, and then no work gets done. So for me, mitochondria are like that unreliable generator, supposed to make energy but always causing tension before exams no?
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