• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

An Essay on the Differences between Prokaryote & Eukaryote cells.

Extracts from this document...


An Essay on the Differences between Prokaryote & Eukaryote cells All cellular organism fall into two natural groups, known as prokaryotes and eukaryotes. These two groups are fundamentally different. The terms prokaryote and eukaryote refer to the differences in the location of the DNA. In prokaryotes the DNA is not enclosed by nuclear membranes and lies free in the cytoplasm. The cells therefore lack true nuclei . The cells of eukaryotes, however, do contain true nuclei. Eukaryotes arose around 1.2 thousand million years ago, and they evolved from prokaryotes which began around 3.5 thousand million years ago. Although the location of the DNA in the cells is the major difference between the cell types, there are many more differences, which are explored below. ...read more.


While in eukaryotes the DNA is not naked and is associated with protein & RNA to form chromosomes. In the two types of cells the ribosomes which are used in protein synthesis are slightly different, in prokaryotic cells the ribosome are 70S and smaller than the 80S larger ribosomes in eukaryotic cells. In eukaryotic cells the ribosomes may be attached to the endoplasmic reticulum, while in prokaryotic cells there is no endoplasmic reticulum. When it comes to organelles prokaryotes have relatively few, and the ones present have no envelope surrounding them. Furthermore, prokaryotes have few internal membranes, and if present they are usually only used for respiration or photosynthesis. On the other hand eukaryotes have many organelles, and many are envelope bounded such as the nucleus or mitochondria. ...read more.


In eukaryotes the cell walls of green plants and fungi are rigid and contain polysaccharides; cellulose is the main strengthening compound in plant walls and chitin in fungal walls, however, there are none in animal cells. However, prokaryotes cell walls are rigid and contain polysaccharides with amino acids, and murein is the main strengthening compound. Finally when it comes to movement of the cells, flagellum is used in cells; however the flagellum in prokaryotes and eukaryotes are slightly different. In prokaryote cells the flagella is simple and lacking in microtubules, it is also extra cellular, and it has an average diameter of 20nm. On the other hand in eukaryotes the structure is complex with '9+2' arrangement of microtubules, it is also intracellular, and the eukaryote flagella also have a diameter of around 200nm. In conclusion, as seen there are many differences between prokaryotes and eukaryotes, in functions, structure and processes. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Molecules & Cells section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Molecules & Cells essays

  1. Eukaryotes and Prokaryotes

    is to fertilise the egg cell (female gamete). - Epithelial cells are lining cells, for example, inside the cheeks. - Red blood cells contain haemoglobin to carry oxygen to the cells. - White blood cells are there to fight disease, either to engulf bacteria or make antibodies.

  2. Discuss how Prokaryotes are the same as Eukaryotes.

    The living world therefore has 3 main divisions, the baceria the archaea and the eukaryotes. On a molecular level, archaea tend to resemble eukaryotes, but they are most similar to eubacteria in their apparatus for metabolism and energy conversion. Prokaryotes also have a much greater flow of genes within the population.

  1. Cells Essay.

    This division is based on internal complexity. Prokaryotic cells are highly organised cells, and do not have a nucleus. These cells are simple in structure, with no recognizable organelles. They have an outer cell wall that gives them shape. Right under the rigid cell wall is the more fluid membrane.

  2. Human Awareness Essay

    they possibly could, and it would be back to the individual genetic potential of the players, it would be like giving everyone in a race the same head start.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work