A mitochondrion has just been engulfed by a cup-shaped isolation membrane as it undergoes mitophagy. Before lysosomal fusion, how many membranes separate the cytosol from the matrix of the engulfed mitochondrion?

Question

Quizplus · Accepted Answer

Two membranes from the cup-shaped structure and two membranes from the original mitochondrion surround the mitochondrial matrix. After fusion of the outermost membrane with the lysosomal membrane, the three inner membranes would be digested away in the process of autophagy.

A Mitochondrion Has Just Been Engulfed by a Cup-Shaped Isolation