Cell Biology Essay Example | Topics and Well Written Essays - 500 words - 3

Cell Biology - Essay Example Their sizes range from 1 to 100 micrometers. Thanks to modern day technology, detailed images of the most complex cells can be obtained through advance microscopes. Mainly there are 2 types of cells, Eukaryotic and Prokaryotic; the first ones can be found in animal, plants and fungi while the later ones include bacteria and archaeans. Prokaryotes are single-celled organisms which were the most primitive forms of life on earth, and are able to survive in the most extreme habitats. Cell biology has made one of the most useful and interesting discoveries of modern times – DNA. DNA (deoxyribonucleic acid) is perhaps the key to finding the hidden truths about human life cycle. DNA is type of molecule known as nucleic acid, and is located within the nucleus of cells (Bailey 2010). Chromosomes are the main component of reproduction; proteins and DNA are the main constituents within these chromosomes, therefore DNA serve as a major part of reproduction cycle. Cells have quite a complex structure, there are other structures contained in a single cell and are called as Organelles. Each of these organelles carries out a specific task, just like the different organs of our bodies, which perform their specific function in order to enable the running of over all system smoothly. Similarly these organelles execute wide range of functions within a cell that range from providing energy to reproducing hormones and enzymes. The Eukaryotic cells contain different range of organelles and prokaryotic contain separate organelles, which are known as ribosome. In the same way plants and animals have different combinations of organelles but some of the elements are common throughout, such as: Nucleus, Mitochondria, Endoplasmic reticulum and Golgi complex. The unique characteristic of cells is that different types of cells have a different reproduction mechanism for them. Fossils from primitive times came into their final form through a process called