Final answer:
Freeze-fracturing technique is a valuable method in biology for studying the internal structure of cells and tissues, especially the plasma membrane and its organization.
Step-by-step explanation:
Freeze-fracturing technique, also known as freeze-fracture electron microscopy (FF-EM), is a method used to study the internal structure of cells and tissues. It involves freezing a sample and then fracturing it to reveal the internal structures and membranes. This technique is especially valuable for studying the plasma membrane and its organization, as well as for visualizing the arrangement of proteins and other components within the cell.