Which of these is a phospholipid bilayer of the mitochondrion?

a. inner membrane only

b. outer membrane only

c. both the inner and outer membranes

d. neither the inner nor outer membranes

a. inner membrane only

It makes the cell membrane selectively permeable because of its characteristics as being fluid or its fluidity which means to say that they can move freely within the lipid bilayer. The membrane proteins can also be stored in the lipid bilayer together with the enzymes. It cannot be denied that membrane proteins have a lot of functions based on its type. They can be integral proteins, peripheral proteins and lipid bound proteins.

The phospholipid bilayer of the mitochondrion would be the inner and both the outer part of the membrane - C. The phospholipid bilayer is actually considered to consist of both parts of the membrane and in reality is the main constituent part of the membrane.