Question: Matrix

Answer: Where Krebs Cycle takes place

Question: Cristae

Answer: The electron transport chain and chemiosmosis takes place on this membrane as part of cellular respiration to create ATP. The cristae increase the surface area of the inner membrane, allowing for faster production of ATP because there are more places to perform the process.

Question: Inner Membrane

Answer: The inner membrane is also loaded with proteins involved in electron transport and ATP synthesis. This membrane surrounds the mitochondrial matrix, where the citric acid cycle produces the electrons that travel from one protein complex to the next in the inner membrane.

Question: Outer Membrane

Answer: The outer membrane is the gateway to the mitochondrion, just like the cell membrane is for the cell. It has porins to allow smaller proteins in and protein complexes to allow bigger proteins in. It works in concert with the inner membrane to allow these proteins into the matrix.

Question: Intermembrane Space

Answer: Where oxidative phosphorylation takes place