CELL RESPIRATION
OXIDATIVE PHOSPHORYLATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
cytosol
|
|
|
matrix
|
|
|
intermembrane space
|
|
|
thylakoid
|
Detailed explanation-1: -It generates a pH gradient across the inner mitochondrial membrane, with the pH higher in the matrix than in the cytosol, where the pH is generally close to 7.
Detailed explanation-2: -The pH of the intermembrane space is about 7.0, whereas the pH of the matrix is about 8.0.
Detailed explanation-3: -Mitochondrial matrix has a pH of about 7.8, which is higher than the pH of the intermembrane space of the mitochondria, which is around 7.0–7.4.
Detailed explanation-4: -The ATP formation is driven by H+ flowing down its concentration gradient, which means that the outside concentration of H+ has to be higher than the matrix in order for that to occur. Thus, higher H+ outside constitutes lower (acidic) pH in comparison to the more basic matrix because of ETC activities.
Detailed explanation-5: -Which side of the inner mitochondrial membrane would have a higher pH? The side of the inner mitochondrial membrane that would have a higher pH would be the inner membrane because it has a low number of hydrogen ions.