10+ Year Member
7+ Year Member
- Apr 11, 2007
- Medical Student
How many electron tranport chains are there per mitochondrion in the inner membrane? Is it just 1 per? I tried to find an answer online but couldn't.
No, the inner mitochondrial membrane has many copies of the proteins involved in the electron transport chain and ATP synthesis. If there were only one per mitochondrion, not enough energy would be generated.
I don't think you'd find a definitive value for what you're looking for and I doubt you would ever be tested on knowing how many copies of a certain protein exist in typical cell/compartment/etc.
The term "chain" is used primarily to conceptualize the process of oxidative phosphorylation. As I understand it, the various complexes (of which there are probably thousands of each type) of the ETC are freely floating along the inner mitochondrial membrane and are able to communicate (pass electrons) to one another via various coenzymes.Yeah I thought it would be more than one. But then yet again they always say Chain and not "Chains." Plus we have thousands of mitochondrion per cell so I thought maybe there would be enough energy if there were just 1. It seems way more reasonable that there would be more but I just wanted to be sure.