The diagram of the ultrastructure of a plant cell is given below. Identify the function of the organelles labeled A, B, C, D, E in the diagram.
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(A) functions as the Principal director of macromolecular traffic. Its Golgi apparatus. Golgi apparatus is called so because it acts as an area for the storage processing and packaging of all the cell secretions. All macromolecules which are to be sent outside the cell, move through the golgi body. So golgi body is termed as "Director of macromolecular traffic in cell'' or 'middle men of the cell'. It takes part in synthesis of cell wall material.
(B) functions as the site of oxidative phosphorylation. It is mitochondria. Oxidative phosphorylation is the process in which ATP is formed as a result of the transfer of electrons from NADH or FADH2 to O2 by a series of electron carriers. This process, which takes place in mitochondria, is the major source of ATP synthesis.