CELL : CELL Cell is the basic unit of all life. All living things are made up of cells. Some organisms consist of only one cell. Plants and animals are made up of many cells. The human body has more than 10 trillion (10,000,000,000,000) cells.
Most cells are so small they can be seen only with a microscope. It would take about 40,000 of your red blood cells to fill this letter O. It takes millions of cells to make up the skin on the palm of your hand.
Some one-celled organisms lead independent lives. Others live in loosely organized groups. The cells in plants and animals are specialists with particular jobs to do. As you read these words, for example, nerve cells in your eyes are carrying messages of what you are reading to your brain cells. Muscle cells attached to your eyeballs are moving your eyes across the page. Nerve cells, muscle cells, and other specialized cells group together to form tissues, such as nerve tissue or muscle tissue. Different kinds of tissues form organs, such as the eyes, heart, and lungs. All the specialized cells together form you
Schematic of bio solar cell using two nano-scale electrodes : Schematic of bio solar cell using two nano-scale electrodes
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MOLECULAR : MOLECULAR Molecular biology is the study of those molecules that direct molecular processes in cells. For example, genetic information is stored in large molecules in the cells of organisms. The way in which these molecules convert their information into chemical reactions gives an organism its particular characteristics and is essential for its life. Molecular biology has provided a greater understanding of "what life is" and "how life works." Scientists use their knowledge of molecular biology in genetic engineering and other forms of biotechnology. See Biotechnology.
Slide 7: http://reference.howstuffworks.com/molecular-biology-encyclopedia.htm.