Oh man i remember learning about this but i cant remember what the answer is i will see what I can do :D
The matrix (inside mito) has a negative charge compared to the intermembrane space (outside of mito but still inside) because positively charged protons are constantly pumped from the matrix to the intermembrane space. A cell oxidizes an organic molecule producing 3 NADH molecules and 3 FADH2 molecules..
no beacuse they are differnt parts of the human with different functions