Egg Macromolecules Lab
In this lab, we asked the question can macromolecules be identified in an egg cell? In the egg membrane, when a mixture of sodium hydroxide (NaOH) and copper sulfate (CuSO4) was added, the solution tested positive for proteins. The membrane changed to a lavender color. It scored a 5 out of 10 points on a scale of amount of color change. This happened because there are transport proteins in the egg membrane that keep bacteria out. The egg white tested positive for proteins when a mixture of sodium hydroxide (NaOH) and copper sulfate (CuSO4) was added. The egg white turned dark purple, and earned a 7/10 on the color changing scale. The egg white tested positive for proteins because there are structural proteins used as food, and enzymes in the immune system break up bacteria. The egg yolk tested positive for lipids. The yolk changed to a medium red color and earned a 7 out of 10 on the color changing scale. Lipids can be found in the egg yolk because lipids store energy and sugars in the egg yolk.
While our hypothesis supported was supported by our data, there could have been errors due to the egg yolk not mixing in with the solution. Due to these errors, in my future experiments I would recommend making sure the solution mixes before testing my hypothesis. I would also recommend using a pipette to mix the solution.
This lab was done to demonstrate where macromolecules are found in a cell. From this lab, I learned where monosaccharides, polysaccharides, proteins, and lipids can be found in an egg, which helps give me a hands on activity showing where macromolecules can be found in a cell. It also helps me understand the structure of a cell. Based on my experience from this lab, I can find each of the macromolecules in a cell and I understand how important it is to consume every type of macromolecule.
While our hypothesis supported was supported by our data, there could have been errors due to the egg yolk not mixing in with the solution. Due to these errors, in my future experiments I would recommend making sure the solution mixes before testing my hypothesis. I would also recommend using a pipette to mix the solution.
This lab was done to demonstrate where macromolecules are found in a cell. From this lab, I learned where monosaccharides, polysaccharides, proteins, and lipids can be found in an egg, which helps give me a hands on activity showing where macromolecules can be found in a cell. It also helps me understand the structure of a cell. Based on my experience from this lab, I can find each of the macromolecules in a cell and I understand how important it is to consume every type of macromolecule.
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