10
For every one NADH molecule oxidized at complex i ,  10 total hydrogen ions are pumped across all of the complexes from the mitochondrial matrix to the inner membrane space.
How many complexes are involved in mitochondrial electron transport?
4 proteins
- The oxidative phosphorylation process, also known as the electron transport chain, is a collection of four protein complexes that combine redox events to produce an electrochemical gradient that results in the production of ATP. 
- Both photosynthesis and cellular respiration take place in mitochondria.
What distinguishes Complex 1 from Complex 2 in particular?
- Complex I pulls four protons from the matrix into the intermembrane gap and absorbs high energy electrons from NADH. 
- Succinate dehydrogenase is in Complex II. 
- In the Krebs cycle, Complex II transforms succinate to fumarate and produces FADH2. 
- Directly obtaining FADH2, Complex II provides two electrons to electron transport system..
To learn more about mitochondrial matrix visit:
https://brainly.com/question/1602075
#SPJ4