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The four organelles I am going to choose to illustrate my examples on how functions of the main cell components relate to overall cell function are mitochondria, lysosomes, ribosomes and nucleus.

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Introduction

Use 4 examples to explain how the functions of the main cell components relate to overall cell function (M1) The four organelles I am going to choose to illustrate my examples on how functions of the main cell components relate to overall cell function are mitochondria, lysosomes, ribosomes and nucleus. I am going to briefly describe their functions in the main cell components and their role within the cell. Functions of the four chosen organelles in the cell Mitochondria Functions include releasing energy after completing oxidation of glucose and to form ATP by catching the energy and using it to power metabolic functions of the cells. Ribosomes Bind together with rough ER (endoplasmic reticulum) and mRNA (messenger RNA). Another function includes producing proteins in order to enable translation of mRNA. Nucleus Its functions within the cell include control cellular activity and responsibility for protein production in ribosomes. Lysosomes Their functions include clearing up after debris, infectious agents for example bacteria and eat up old organelles that are not wanted. ...read more.

Middle

Proteins can also be manufactured for the cells own use using free ribosomes. An example of this maybe, ''certain cells in the pancreas which manufacture insulin a protein hormone.'' (Stretch, Whitehouse (2007) Health and Social Care Book 2) their roles consist of joining and binding to mRNA and rough ER. In order to produce protein they must also enable translation of mRNA. Reference http://micro.magnet.fsu.edu/cells/ribosomes/ribosomes.html Nucleus This is commonly the largest structure inside the cell and takes up stains very easily and appears to be very dark. There are many differences but most cells have a single, central spherical nucleus. Multinucleate is the term given to muscle cells with many nuclei. Distinct lobed nuclei maybe present in some white blood cells. Cells that are separated from their nuclei usually die with the exception of red blood cells which cannot reproduce or divide and have a limited life span. Proteins and nucleic acids have the ability to pass through small gaps or a pore in the nuclear membrane, the structure is also alike to that of the cell membrane. ...read more.

Conclusion

After destruction, they take foreign matter into their vesicles and release the digested material outside the cell; this explains how another function of lysosomes is carried out, to destroy bacteria and other foreign materials that enter the cell. Some white blood cells for example phagocytes and monocytes and macrophages (tissue cells) are lysosome filled, thus explains how the function to destroy bacteria, foreign materials is carried out. Internal cell destruction is possible when disease causing agents damage lysosome membranes. Lysosomes role is described as the 'cleaners' or 'recyclers' of the cell because they clear up after debris, infectious agents like bacteria and eat up old organelles that are not wanted. Commonly membrane bound material binds with one or more lysosomes in order for the digestive enzymes to break the material down to raw material. Lysosomes are vesicles of digestive enzymes and throughout the cell they are scattered. Autolysis is the process in which whole, damaged or old cells get destroyed. Cell damage or mutations of genetic material is the solution some people believe in when infectious organisms, organisms and cancer causing agents damage the membrane. Reference http://www.east-haven.k12.ct.us/dcmoore/Grade%206/Cell%20Websites/angelica.html ?? ?? ?? ?? Sadia Ellahi 20093700 BTEC National In Health Studies ...read more.

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Here's what a star student thought of this essay

3 star(s)

Response to the question

Quite simplistic essay with no in-depth analysis. Introduction quite simple, choice of organelles could be explained. I would have been tempted to choose the four organelles I considered most important to the cells overall function. Main body of the essay ...

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Response to the question

Quite simplistic essay with no in-depth analysis. Introduction quite simple, choice of organelles could be explained. I would have been tempted to choose the four organelles I considered most important to the cells overall function. Main body of the essay provides a clear response but is quite simplistic in style for this level. No conclusion which I would expect.

Level of analysis

Descriptions of functions are very simple and I would expect a lot more depth from a top level candidate. Terms used are also quite simplistic. Structure of the essay set out nice and clearly but with no clear cross linking and in depth analysis which I would prefer to see. Rather than blocks of what the organelles do and their function, clear linkage through one paragraph and a larger picture of what the cell does would be better. Relations to functions are not clear and contain rather a lot of 'waffle' that is not relevant to the structure to function relationship of the organelle. No clear conclusion, and rather than the relationship of structure to function in some instances only the function has been explained and even then not expanded on very well.

Quality of writing

Incorrect uses of punctuation and spacing in places. Spelling, grammar and punctuation otherwise largely good.


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Reviewed by skatealexia 13/03/2012

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