Cell biology organelle structure and function jones and bartlett books in mathematics jones and bartlett series in biology life science series author david e sadava edition illustrated. A microscope is required to study cell structure scientist robert hook first studied the cell structure in the year 1665 using a self designed microscope a cell having following structure and function of cell organelles major cell organelles are as follows 1cell membrane cell membrane enclose the cell and regulates the in and out flow of substance it is also known as plasma membrane which form the covering of animal cell. Organelle structure and function organisms are composed of cells and these cells have specific structures within in them that allow them to carry out their functions these structures are called organelles the fine detail of the cell which may be revealed by an electron microscope is called the cells ultrastructure. The nucleus is a double membraned organelle found in all eukaryotic cells it is the largest organelle which functions as the control centre of the cellular activities and is the storehouse of the cells dna by structure the nucleus is dark round surrounded by a nuclear membrane