The Eukaryotic Cell
The Discovery of the Cell
Cells are the smallest, and yet, most fundamental units of life. Scientists estimate the human body is composed of relatively one hundred trillion cells; ranging from our unique erythrocytes to our complex neurons. All these cells work in unison to produce a healthy, intellectual human being capable of contemplating the vastness of interstellar space, and even the complexity of themselves. In 1665, British scientist Robert Hooke, best known for his laws of elasticity, first discovered cells when he was studying cork tissue, and had seen a cell wall through his rather ‘crude’ and primitive microscope. Hooke later referred to the tiny pores within the cork as ‘cells’ due to their resemblance to monk cells as they appeared to be ‘boxlike’. Today, we now know that what Hooke had really discovered were dead plant cells. After years of dedicated research, we have been able to view cells in a precise and detailed manner, resulting in the discovery of organelles and many cellular processes such as mitosis and respiration. Current biological research has led to the discovery of stem cells in human teeth and their manipulation in …show more content…
Being the synthesisers of proteins, ribosomes of made from proteins themselves, in addition of RNA. As briefly mentioned, ribosomes are manufactured within the nucleolus, the dense part of the nucleus. Whether they are attached to the rough endoplasmic reticulum, or free in the cytoplasm, ribosomes are always busy. Ribosomes are actually comprised of two parts, or subunits. The largest subunit is called the 60-s (svedberg - unit of measurement for time) and the smallest as the 40-s. When the nucleus produces mRNA, the subunits come together, lock onto the mRNA and begin synthesising it into a protein. All eukaryotic cells have ribosomes which are larger than 80s, and similarly, all prokaryotic cells have lower than
The Discovery of the Cell
Cells are the smallest, and yet, most fundamental units of life. Scientists estimate the human body is composed of relatively one hundred trillion cells; ranging from our unique erythrocytes to our complex neurons. All these cells work in unison to produce a healthy, intellectual human being capable of contemplating the vastness of interstellar space, and even the complexity of themselves. In 1665, British scientist Robert Hooke, best known for his laws of elasticity, first discovered cells when he was studying cork tissue, and had seen a cell wall through his rather ‘crude’ and primitive microscope. Hooke later referred to the tiny pores within the cork as ‘cells’ due to their resemblance to monk cells as they appeared to be ‘boxlike’. Today, we now know that what Hooke had really discovered were dead plant cells. After years of dedicated research, we have been able to view cells in a precise and detailed manner, resulting in the discovery of organelles and many cellular processes such as mitosis and respiration. Current biological research has led to the discovery of stem cells in human teeth and their manipulation in …show more content…
Being the synthesisers of proteins, ribosomes of made from proteins themselves, in addition of RNA. As briefly mentioned, ribosomes are manufactured within the nucleolus, the dense part of the nucleus. Whether they are attached to the rough endoplasmic reticulum, or free in the cytoplasm, ribosomes are always busy. Ribosomes are actually comprised of two parts, or subunits. The largest subunit is called the 60-s (svedberg - unit of measurement for time) and the smallest as the 40-s. When the nucleus produces mRNA, the subunits come together, lock onto the mRNA and begin synthesising it into a protein. All eukaryotic cells have ribosomes which are larger than 80s, and similarly, all prokaryotic cells have lower than