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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Sadia Ellahi

20093700

BTEC National In Health Studies

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.

Role within the cell

Mitochondria

Mitochondria release energy. They are described as ‘sausage shaped’ or ‘spherical’ bodies found in cytoplasm; each and every cell of the body contains at least 1000 of these, which are very energy active some cells will have more mitochondria for example muscle or liver cells. Cristae is contained in each mitochondrion, the term cristae is given to the ‘internal’ shelves in the inner layer which are folded, it is also double layered for stages of glucose oxidation that are terminal. Responsible enzymes are identified in the cristae. The released energy now becomes stored after being trapped until it is required by ATP which is described as a ‘chemical battery’. ATP breaks down to ADP and energy when there is need for building complex molecules, movement and secretion. It is then built up to ATP again in the mitochondria after being recycled. After being catalyzed by enzymes the breakdown of glucose is dissolved in the internal fluid. Enzymes with the association of ATP lie together in order, in the cristae. The remnants of simple bacteria which were sectioned in the cells millions of years ago is the solution given to mitochondria having their own ribosomes in which some scientists believe in.

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Ribosomes

Few ribosomes exist in cytoplasm but usually the most common location would be small spherical bodies in the E.R. 35% protein and 65% rRNA makes up the ribosome rRNA, this is also in relation to the nucleoli (synthesis site). The structure of ribosomes consists of two separate sections, 1 large and 1 small which includes the protein and rRNA. Ribosomes exist in large quantities usually in the cells and have the role of producing protein on the rough ER ribosomes make cell proteins to be used in the cell membrane or for export from the cell to ...

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

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.

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.