Читать книгу Cell Biology - Stephen R. Bolsover - Страница 12
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SECTION 1
THE STRUCTURE OF THE CELL
The cell is the fundamental unit of life. A cell comprises a complex and ordered mass of protein, nucleic acid, and many biochemical species separated from the world outside by a limiting membrane. Cells expend energy to maintain a highly ordered state, and this expenditure of energy and the ability to repair themselves distinguishes living cells from lifeless packets of biological material such as viruses. In the first two chapters we will describe the basic structure of cells and how they can be observed with a microscope. We will describe how, in animals, cells containing the same DNA database assume very different shapes and functions and organize themselves into tissues.
Chapter 1: A Look at Cells and Tissues
Chapter 2: Membranes and Organelles
