<P> A mitochondrion contains outer and inner membranes composed of phospholipid bilayers and proteins . The two membranes have different properties . Because of this double - membraned organization , there are five distinct parts to a mitochondrion . They are : </P>
<P> A mitochondrion contains outer and inner membranes composed of phospholipid bilayers and proteins . The two membranes have different properties . Because of this double - membraned organization , there are five distinct parts to a mitochondrion . They are : </P>
the number of membranes surrounding a mitochondrion is
the number of membranes surrounding a mitochondrion is
two
two