Cellular And Molecular Biology

Every living organism is made up of cells, and like all species, cells grow, age, and die with time. Living cells grow and multiply continuously, and that is why a new born baby grows into adolescence and then to middle-age before becoming old. This cycle is repeated by cells in all living organisms. The reason why old age is associated with death is because the cells in the body stop producing more cells to replace the dying or dead cells, and this culminates in reduced body functions. In old age dead cells outnumber new cells because of which, functions slow down and finally stop, leading to death.

The study of cells can be as complicated as understanding them. Cellular biology deals with the study of cells life cycle and their possible reactions and interaction to the environment in which they exist. As cellular biology sees cells as the primary unit of life, it seeks to understand the functionalities of cells in an organism. Molecular biology, on the other hand, explores cells characteristics and how molecules control the cells’ activities and growth.

While the subject of cellular and molecular biology can be complex, it is a highly challenging field of study that scientists undertake to understand the existence of life on this planet. Understanding how cells originate, how they multiply, or how they function, can be intriguing, but it is only through their study and researches can solutions to problems or challenges to human existence be found. This is precisely what cellular and molecular biology address. For example, dementia and Alzheimer’s disease are common among baby boomers. When the brain refuses to recognize or function normally, it affects an individual’s cognitive and physical condition to such an extent that that individual’s behaviour becomes erratic or abnormal. There are many reasons for this, and one reason attributed to this is the lack of oxygen reaching the brain. Cells carry oxygen to the brain and when their numbers reduce, so too will the level of oxygen reaching the brain. The sporadic flow of oxygen to the brain leads to memory loss, erratic behavior, and spasms. Scientists, by studying cellular and molecular biology, try to understand the characteristics and behavior of cells to try and find ways to overcome its impact on humans.


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