1. Our blue reference was slightly ahead of our blue sample. We had no orange dye in our samples unlike our reference. The green sample separated out into blue and yellow, which we expected because green is made of blue and yellow. The references were a bit brighter than the samples. All of them moved in the right direction.
2. Citrus Red 2 would move at the same speed as Red 40, Yellow 6 and Yellow 5 because they are all made up of three sugars. Fast green FCF and Blue 1 would move at similar speeds because they are both made up of 5 sugars and have a similar structure.
3. Dog food manufacturers put artificial food colors in dog food to modify the appearance of the dog food. They try and use the food colors to make the food look richer and, therefore, healthier. People are tricked into buying these foods because they think it is the best thing for their dog.
4. Artificial food colors may be preferable to natural food colors because, while they are unhealthy, using a smaller amount probably results in a darker and richer color. This appeals to customers and the manufacturers save money.
5. Length affects how far the colored solutions migrate because the shorter it is the easier it is to migrate faster. Structure would also affect the speed. If the structure is thin and long, then it will be much slower than a short and contained one.
6. An electric current moves the dyes through the gel. The dyes have a negative charge, and a positive charge is put at the other end of the box and a negative charge is behind it. The dyes repel the negative charge and are attracted to the positive charge which causes them to move.
7. The gel is filled with tiny holes. The smaller the molecules are, the easier it is for them to avoid the holes and get to the other end. The bigger molecules take a more time to navigate around the holes, causing them to get left behind.
2. Citrus Red 2 would move at the same speed as Red 40, Yellow 6 and Yellow 5 because they are all made up of three sugars. Fast green FCF and Blue 1 would move at similar speeds because they are both made up of 5 sugars and have a similar structure.
3. Dog food manufacturers put artificial food colors in dog food to modify the appearance of the dog food. They try and use the food colors to make the food look richer and, therefore, healthier. People are tricked into buying these foods because they think it is the best thing for their dog.
4. Artificial food colors may be preferable to natural food colors because, while they are unhealthy, using a smaller amount probably results in a darker and richer color. This appeals to customers and the manufacturers save money.
5. Length affects how far the colored solutions migrate because the shorter it is the easier it is to migrate faster. Structure would also affect the speed. If the structure is thin and long, then it will be much slower than a short and contained one.
6. An electric current moves the dyes through the gel. The dyes have a negative charge, and a positive charge is put at the other end of the box and a negative charge is behind it. The dyes repel the negative charge and are attracted to the positive charge which causes them to move.
7. The gel is filled with tiny holes. The smaller the molecules are, the easier it is for them to avoid the holes and get to the other end. The bigger molecules take a more time to navigate around the holes, causing them to get left behind.
8. The DNA with the weight of 600 daltons would be the farthest from the well. Then it would be 1000, 2000, and 5000 respectively. The heavier pieces of DNA would be bigger and the lighter pieces would be heavier. The smaller pieces of DNA always travel faster than the bigger ones. (refer to question 7)
Before the current flows
In the box
Out of the box
The color dye samples
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