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Answers to Egg Chemistry Questions
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Answer #1
The small amount of fat in the latebra spectrum could be due to the box being too big. The corners stick out into the yolk, which is high in fat.

Answer #2
Proteins are typically only present at very low concentrations (1 millimole/liter for example). Water is very concentrated (55 moles/liter). So the sensitivity of these spectra is just not good enough to show the proteins.

Answer #3
We don't know. The box is too big to tell - it covers both light and dark rings. This would be a good experiment for a future student to repeat, using a smaller box and placing it on each of the rings.

Answer #4
Fat ("lipid") is the major component of membranes. The baby chick will be growing a lot of cells, each with a membrane around it. The lipid will be converted into the structure of tissue. Also, the fat can be oxidized to carbon dioxide and water to provide energy to drive the growth of the chick.

Answer #5
The yolk is floating at the top of the (mostly water) albumen. Fat is less dense than water, so it floats.
C.D.Gregory: April 24, 1996



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