Structure a is _____. There is a lipid bilayer of the mitochondrial membrane. It separates the intermembrane space and mitochondrial matrix. There are structures integrated into the membrane. Structure a is a bulb-like structure with a port connecting the intermembrane space and mitochondrial matrix. Structure a is _____. There is a lipid bilayer of the mitochondrial membrane. It separates the intermembrane space and mitochondrial matrix. There are structures integrated into the membrane. Structure a is a bulb-like structure with a port connecting the intermembrane space and mitochondrial matrix. Atp synthase sensory protein an electron acceptor an electron donor phospholipid