Which statement does NOT describe a difference between the inner and outer mitochondrial membranes? A) The outer mitochondrial membrane contains porins, whereas the inner mitochondrial membrane does not. B) The outer mitochondrial membrane is permeable to large proteins (M_r 10,000), whereas the inner mitochondrial membrane is not. C) A pH gradient exists across the inner mitochondrial membrane but not the outer mitochondrial membrane. D) The inner mitochondrial membrane contains a smaller percentage of lipid relative to protein compared with the outer mitochondrial membrane. E) The outer mitochondrial membrane has a smaller surface area than the inner mitochondrial membrane.

Question

Which statement does NOT describe a difference between the inner and outer mitochondrial membranes? A) The outer mitochondrial membrane contains porins, whereas the inner mitochondrial membrane does not. B) The outer mitochondrial membrane is permeable to large proteins (M_r > 10,000), whereas the inner mitochondrial membrane is not. C) A pH gradient exists across the inner mitochondrial membrane but not the outer mitochondrial membrane. D) The inner mitochondrial membrane contains a smaller percentage of lipid relative to protein compared with the outer mitochondrial membrane. E) The outer mitochondrial membrane has a smaller surface area than the inner mitochondrial membrane.

Quizplus · Accepted Answer

The outer mitochondrial membrane is not permeable to large proteins; it is permeable to small molecules and ions due to the presence of porins.

Which Statement Does NOT Describe a Difference Between the Inner