Free Download Biology 1sec SB E 2014 by Shalaby .M.N et al.

Biology 1sec SB E 2014 by Shalaby .M.N et al.

Biology is closely related to chemistry. Chemistry explains the chemical structure of living organisms and the reactions taking place inside their cells. There are four basic types of organic molecules necessary to the life of living organisms. These molecules are carbohydrates, proteins, lipids, and nucleic acids. All living organisms are made up of these four molecules. These four molecules are called the biological macromolecules. In this unit, you will identify the molecular structure, functions and importance of these molecules to the living organisms. Furthermore, you will identify the chemical processes related to the functions of life. In this unit, you will practise some practical and applied activities that help you to understand the nature , structure and functions of the biological macromolecules and the chemical reactions which occur inside the cells. These activities improve some of your skills such as observations, experimentation, measurement, conclusion, interpretation, controlling the variables and so on.