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

The Effect of Indicators on the presence of Macromolecules in a McMush slurry

Extracts from this document...


The Effect of Indicators on the presence of Macromolecules in a ?McMush? slurry 10 October, 2012 Rani Bhangu 1. The Effect of Indicators on the presence of macromolecules in a McMush 2. Design 1. Are carbohydrates, lipids, and proteins present in the McMush? 2. Introduction ?The organic compounds found in living organisms are lipids, carbohydrates, proteins, and nucleic acids. These macromolecules are large carbon-based structures. Common foods, which often consist of plant material or substances derived from animals, are combinations of these organic compounds. The macromolecules are assembled by joining several smaller units, called monomers, together through a chemical reaction called dehydration synthesis or condensation. The resulting polymer can be disassembled/ broken down into monomers through the complimentary process called hydrolysis? (Lazar, 1). Background Carbohydrates are made of carbon, hydrogen, and oxygen atoms (CHO). In the carbohydrate there are two hydrogen atoms for every one oxygen atom present. The monomers for carbohydrates are referred to as monosaccharides. When many monosaccharides are chained together the resulting molecule is called a polysaccharide. Carbohydrates are used by living organisms as an important source of energy. ...read more.


Proteins are made of unique combinations of the twenty amino acid monomers. A string of amino acid monomers joined together by peptide bonds is called a polypeptide? (Lazar, 1). Hypothesis: If the control is positive, then the results for McMush would be the same as the positive control, indicating it contains the specified macromolecule. 1. Variables 1. Independent variable- Type of indicator used 2. Dependent Variable- The presence of a macromolecule in the McMush 3. Controls- Water (in each trial) 1. Sugar solution in simple sugars 2. Cornstarch in polysaccharides 3. Oil for lipids 4. Gelatin solution for proteins 1. Materials (Lazar 3) . McDonald?s Happy Meal McMush slurry . Distilled water (dH2O) . Sugar Solution (glucose/fructose + dH2O) . Cornstarch solution (cornstarch + dH2O) . Gelatin solution (gelatin + dH2O) . Canola Oil . 6-8 test tubes and test tube rack . Masking tape/wax pencil . 10 mL graduated cylinder . Dropper pipettes . Hot water bath (600 mL Beaker filled with water and hot plate) . Beakers or plastic cups . Test tube clamps . ...read more.


Since the positive and negative results were previously told, students had the opportunity to practice skills of determining results from chemical reactions. For example, for proteins, students were told gelatin would turn a blue-violet color when reacted with Biuret?s reagent, and that this meant proteins were present in the substance. Students were then able to determine whether or not proteins were present in the McMush slurry; if the resulting color was similar to the gelatin solution that meant proteins were present. This same process was applied throughout the rest of the experiment, thus students were successfully able to practice their skills in determining chemical reactions in an experiment and which (if any) macromolecules are present. The data supports my hypothesis that the McMush results would be the same as the positive control, indicating it contains the specified macromolecule. Throughout all the experiments, water was the negative control. The other substance (gelatin solution, oil, etc.) were the positive controls. The McMush resulted in the same color after chemical reactions with the indicators as the positive substances? colors after the same chemical reaction. As seen in Table 4, the McMush resulted in the same blue-violet color as the gelatin solution did when chemically reacted with Biuret reagent. According to Madison.k.al12.us, my conclusions are accurate. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology 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 International Baccalaureate Biology essays

  1. Investigating the effect of pH of Hydrogen Peroxide upon the activity of Catalase

    The other pH levels that I used showed a slightly lesser increase in the rate of reaction (pH 4 and pH 10), or very little or no increase at all (pH 1 and pH 14). This is because when the substance is not neutral, which is the optimum pH for

  2. The effect of toliet cleaning products on E-coli ...

    To test the effectiveness of these different agents the Kirby-Bauer test will be used. This test allows different substances to be tested on the same colony of bacteria to examine the effect of the different substances on the bacteria (Xing.Q, pg 3, 2004).

  1. Bio lab - Oxygen Consumption in germinating and non-germinating seeds

    Rate of oxygen consumption for room temperature: Oxygen Consumption (ml) Germinating Seeds Non-Germinating Seeds 0.32 -0.08 0.16 0.09 0.52 -0.04 0.37 0.03 0.26 0.11 0.21 Average 0.301 ml 0.0183 ml Processed Table 13: The actual oxygen consumption of germinating seeds and non-germinating seeds for the room temperature were displayed on the data.

  2. In this extended essay I am looking at the effect of different kind of ...

    Soil taken to burry the chickpea (gram seed) should be the same i.e. should be taken from the same area. This will help in controlling the errors and providing equal nutrients to all seeds.

  1. Extended Essay- How is production of carbon dioxide (CO2) during digestion affected by the ...

    The graduated cylinder should now be upside down, full of water and with its opening under the surface of the water in the tub. It is ready to trap CO2 produced by the yeast-water-carbohydrate mixture. 2. Measure out 1.0g of the yeast and .94g of the carbohydrate.

  2. Should Animals have the same rights as Humans? Both animals and humans exhibit behaviours ...

    with the acquisition of food. A further improvement would be to alter the pitch or tone of the auditory stimuli which would demonstrate whether the dogs could discriminate between pitches. It is also interesting to note that Pavlov conducted a follow up experiment to see if the dogs could be induced to dissociate the auditory stimulus with receiving food.

  1. The effect of pvc piping on the breathing/heart rates of male year 12 students

    This increased heart rate results in fatigue and possibly heart failure as the body is not purposed to deal with limited oxygen levels. Breathing through a straw is a domino effect. More difficult breathing leads to a lower breathing rate, which leads to less oxygen intake, which leads to heart rate increase, which can lead to complications.

  2. Identification of Carbohydrates ,Lipids,and Proteins lab

    The solution turns red if there are lipids present. Purpose: To show the presence of lipids in various foods. Independent Variables: The materials tested Dependent Variables: the translucency of the paper/ the presence of colloidal droplets/ the colour of a substance. Controlled variables: same paper is used, same amount of materials, same amount of ethanol used, same amount of

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