Exemplars

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How do different concentrations of ethanol, C2H5OH (0%, 7.5% 15%, 30%, 60%) affect the permeability of cell membranes in beetroot of Beta vulgaris L. through examining the quantity of pigment leaked into ethanol solution using the Vernier Colorimeter?

May 2022
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Examiner's summary

Criterion A [2/2]:

The student has selected a topic that is relevant both globally and personally, as they have linked it to the increased usage of hand sanitizer and their own interest in the effects of ethanol on cells. Additionally, the student has demonstrated strong initiative by designing and conducting the study, as evidenced by their process of researching the topic, designing the method, and justifying the variables.

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Criterion B [5/6]:

The student provides a detailed and focused description of the research question and relevant background information. The biology is explained clearly and concisely using appropriate terminology, and the methodology chosen is highly appropriate and well-focused on answering the research question. The student also demonstrates full awareness of safety, ethical, and environmental concerns that may arise during the experiment. However, the aim of the experiment is not explicitly stated, although it is assumed by the research question.

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Criterion C [0/0]:

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Criterion D [0/0]:

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Criterion E [0/0]:

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This is an example of past student work. Do not copy or submit as your own. Use to understand the requirements, expectations, structure and flow.