Mitochondria
A) have a porous inner membrane and nonporous outer membrane.
B) have a higher pH inside the matrix than outside during active electron transport.
C) have an outer membrane that is composed of lipids and protein electron transport complexes.
D) generate ATP for the cell under anaerobic and aerobic conditions.

Question

Quizplus · Accepted Answer

During active electron transport, hydrogen ions are pumped from the mitochondrial matrix to the intermembrane space, creating a higher concentration of hydrogen ions outside the matrix and a lower pH, making the pH inside the matrix higher.

Answer: C 
 The outer membrane of the mitochondria is composed of lipids and protein electron transport complexes, including porin, a protein that forms channels in the outer membrane.

Answer: D 
 Mitochondria generate ATP for the cell through the process of oxidative phosphorylation, which requires oxygen and occurs in the mitochondria's inner membrane. This process can only occur under aerobic conditions, but mitochondria can also generate ATP through glycolysis, a process that can occur under anaerobic conditions.