Question

question 3
1 pt
during oxidative phosphorylation, protons (h+) are pumped:
into the matrix
into the intermembrane space
out of the mitochondria

Explanation:

Oxidative phosphorylation occurs in mitochondria. Electron transport chain complexes pump protons (\(H^+\)) from the mitochondrial matrix into the intermembrane space. This creates a proton gradient. The proton - motive force generated by this gradient is used by ATP synthase to produce ATP. Pumping protons into the matrix would decrease the gradient (opposite of what is needed). Pumping out of mitochondria is not the case as the key is the gradient within the mitochondria (between matrix and intermembrane space).

Answer:

into the intermembrane space