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Question

The production of ATP through chemiosmosis is known to occur in which of the following organisms?


A
All cells (prokaryotic and eukaryotic) are capable of respiration using either oxygen or other electron acceptors.
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B
All cells (prokaryotic and eukaryotic), but only in the presence of oxygen.
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C
Eukaryotic cells only, and only when oxygen is present.
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D
All cells that possess mitochondria, and only when oxygen or other electron acceptors are present.
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Solution

The correct option is B All cells (prokaryotic and eukaryotic), but only in the presence of oxygen.
The chemiosmotic theory explains the utilization of proton-motive force or proton gradient for formation of ATP molecules. The e$$^-$$  of the Electron Transport Chain / System are accepted by O$$_2$$ along with the protons to form water molecules and it takes place in both prokaryotic and Eukaryotic 
cells where oxidation of glucose takes place in the presence of oxygen 
So, the correct answer is 'All cells (prokaryotic and eukaryotic), but only in the presence of oxygen'

Biology

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