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Plan: The effect of the end product, phosphate, on the enzyme phosphatase

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  • Essay length: 4551 words
  • Submitted: 16/01/2006
  • Marked by teacher: (?) Luke Smithen
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GCSE Life Processes & Cells

Teacher essay summary

5 star(s)

This is a very well written report that demonstrates a good understanding of scientific processes and methods.
1. The background knowledge section is well written and concise but should include references.
2. The variables section is well thought through.
3. The method section should be simplified and restructured.
4. The data is presented well.
5. The conclusion is detailed but again needs references.
6. The evaluation is the strongest section in the report and shows good statistical knowledge.
***** (5 stars)

Marked by teacher Luke Smithen 01/05/2013

The first 200 words of this essay...

The effect of the end product, phosphate, on the enzyme phosphatase

1. Plan

Phosphatase enzymes release phosphates from a variety of substrates for synthesis of nucleotides, phospholipids, etc. They are found in both plant and animal tissues and can be classified as acid or alkaline depending on their optimum pH. In this experiment an acid phosphatase from potato was used.

Hypothesis

Since phosphate is a product of phosphatase activity, it may act as an end product inhibitor of the phosphatase enzyme, therefore slowing down the enzyme-catalyzed reaction.

Background knowledge

Enzymes are biological catalysts which speed up the metabolic reaction inside the cells. Enzymes are proteins and therefore can function because of their specific 3D shape. The active site is part of the molecule which allows the substrate to enter and form enzyme-substrate complex. If the shape of the active site changed, the substrate will not fit in, therefore the enzyme cannot function properly.

The activity of enzyme is not only affected by temperature, pH, but also by enzyme inhibitors. These are the substances which can reduce the activity of enzymes. There are two types of enzyme inhibitors which refer to competitive and

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MbT essay summary

This is a very well written report that demonstrates a good understanding of scientific processes and methods.
1. The background knowledge section is well written and concise but should include references.
2. The variables section is well thought through.
3. The method section should be simplified and restructured.
4. The data is presented well.
5. The conclusion is detailed but again needs references.
6. The evaluation is the strongest section in the report and shows good statistical knowledge.
***** (5 stars)

Marked by teacher Luke Smithen 01/05/2013

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