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Cells as Basic Unit

   

   

The Cell as the basic unit of Life

The cell is the smallest unit of life. It contains the DNA necessary to create an entire organism, and is the basic building block from which all tissues and organisms are made. Every cell performs the seven life processes, and so each cell individual cell is living.

Chemicals of life ,monosaccharide, disaccharides, polysaccharides

The elements carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus are the key building blocks of the chemicals found in living things. They form the carbohydrates, nucleic acids, proteins, and lipids (all of which will be defined later in this chapter) that are the fundamental molecular components of all organisms.

we will discuss these important building blocks and learn how the unique properties of the atoms of different elements affect their interactions with other atoms to form the molecules of life. These interactions determine what atoms combine and the ultimate shape of the molecules and macromolecules, that shape will determine their function.
 

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