Which part of a mitochondrion does the letter A represent?

What does sawdust do when in water? What its mean when Development takes place gradually? Are the continents of Africa and Asia smaller or larger than the rest of the continents combined? How many optein capsule be taken everyday? Which two metals are used to avoid iron and steel from rusting? Its 2 00 AM in the northeastern US Thunderstorm rumbles on the horizon What type is it mostly likely to be? Where do wildfires mostly occur? What sometimes conducts electricity like a metal and sometimes blocks the flow of electricity like a nonmetal? How are metal carbonate formed? How do you test the presence of starch ingreen plants? What amphibians do not live in water? When ice cube in the poles of earth melt does it effect the rotation of earth? What is dematalisation? Is Saturn a inside plante or a outside planet? Why was British gas sold? What is the path which one body follows around other body in space? Is it possible to survive without a brain? What Evidence Would You Look For If Attempting To Classify A Piece of igneous Rock as Extrusive? What are the components of crude protein? What boundary is it called when an oceanic plate descends beneath a continental plate?

Which part of a mitochondrion does the letter A represent?