The surface of the mitochondria contains a receptor protein that binds specifically to this targeting signal. Binding of MP to the mitochondrial targeting signal receptor leads to the uptake of MP into the mitochondrion at sites where the inner mitochondrial membrane contacts the outer mitochondrial membrane. During uptake into the organelle, MP is unfolded with help from other proteins called chaperonins. Secondary cell walls are made after primary cell walls and therefore are made inside the latter cell wall. The cell membrane is inside the secondary cell wall.
Some endothermic reactions proceed spontaneously.
Give an example of such a reaction and explain in molecular terms why the reaction proceeds spontaneously. The melting of ice to liquid water is an endothermic reaction that proceeds spontaneously because of an increase in entropy. Ice is very ordered because each water molecule is hydrogen-bonded to four specific water molecules. In liquid water, each water molecule has a greater number of possible water molecules with which to form hydrogen bonds - this state of water is more disordered. Identify two functions of catabolism.