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Describe the functions of the Ultra structure of a Eukaryotic cell and compare this with a prokaryotic cell.

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Introduction

Lawrence Johnson Essay task Describe the functions of the Ultra structure of a Eukaryotic cell and compare this with a prokaryotic cell. All animals and plants are composed of microscopically small discrete units known as cells. The Cell is the basic unit of life. Based on the organisation of the cellular structures all living cells can be divided into two groups: prokaryotic and eukaryotic. Animals, plants, fungi, protozoa's and algae all possess eukaryotic cell types. Only bacteria have prokaryotic cell type. Below is a detailed picture of a eukaryotic cell that shows the main organelles inside it; Picture from www.-class.unl.edu/bios201a/spring97/group6 Eukaryotic cells are generally much lager and more complex than prokaryotic. Because of their large size they have specialised internal organelles to carry out special tasks, such as metabolism, providing energy and transporting chemicals throughout the cell. ...read more.

Middle

The mitochondrion is another very important organelle; it produces ATP, which the cell uses as a source of energy. Ribosomes are present in some eukaryotic cells but are not in the above diagram. They are seen as small black spheres. Theses ribosomes assemble amino acids to make proteins. Lymsosomes contain powerful protein-digesting enzymes. These organelles are used to digest protein. The Rough and smooth endoplasmic reticulum have many small functions but in general they speed up the distribution of substances through the cytoplasm. The outer plasma membrane separates the cell from its surroundings and controls the movement into and out of the cell. The Golgi body/apparatus has the job of storing and chemically modifying substances in the cell. ...read more.

Conclusion

Since bacteria are haploid that is they have only one chromosome they reproduce asexually, there is no meiosis process in bacterium. This completely contrasts with a eukaryotic cell. The prokaryotic cell is surrounded by flagella; these are made of protein and play the part of propelling the cell along. The size of the two cells are different also. The eukaryotic is much bigger than the prokaryotic. The respective units of size with respect to cells are micrometres and nanometres. To see the ultra structure of both cells an electron microscope must be used. In conclusion the ultra structures of these two cells differ tremendously, the eukaryotic cell has many more organelles inside it and has more functions. Where as the prokaryotic cell is smaller and has less organelles and no nucleus. The cells differ also in the way the reproduce. ...read more.

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