While conducting an investigation, you observe that exposing inner mitochondrial membranes to ultrasonic vibrations disrupts the membranes. The membrane fragments reseal "inside out," forming small vesicles. These vesicles are still able to transfer electrons from NADH to oxygen and synthesize ATP. Based on these observations, what must be present in the membrane?
A) All of the electrons transport protein as well as ATP synthase
B) All of the electron transport protein system and the ability to add CoA to acetyl groups
C) The ATP synthase system and pyruvate molecules
D) The electron transport system and molecules needed for the citric acid cycle