the number of membranes surrounding a mitochondrion is two.
the number of membranes surrounding a mitochondrion is two.
the number of membranes surrounding a mitochondrion is?
two
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:









































bullet::::1. the outer mitochondrial membrane,









































bullet::::2. the intermembrane space (the space between the outer and inner membranes),









































bullet::::3. the inner mitochondrial membrane,









































bullet::::4. the cristae space (formed by infoldings of the inner membrane), and









































bullet::::5. the matrix (space within the inner membrane).









































mitochondria stripped of their outer membrane are called mitoplasts.









































section::::structure.:outer membrane.
mitochondrion
an ongoing debate concerns the number of membranes surrounding the plastid across apicomplexans and certain dinoflagellates, and the origin of these membranes. this ultrastructural character can be used to group organisms and if the character is in common, it can imply that phyla had a common photosynthetic ancestor. on the basis that apicomplexans possess a plastid surrounded by 4 membranes, and that peridinin dinoflagellates possess a plastid surrounded by 3 membranes, petersen et al. have been unable to rule our that the shared stramenopile-alveolate plastid could have been recycled multiple times in the alveolate phylum, the source being stramenopile-alveolate donors, through the mechanism of ingestion and endosymbiosis.
alveolate