1. Describe the appearance of the plant (i.e., strawberry) DNA after the addition of alcohol.
Added by Patrick T.
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This is because DNA is not soluble in alcohol. Show more…
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What did the DNA look like? Relate what you know about the chemical structure of DNA to what you observed today. Explain what happened in the final step when you added ethanol to your strawberry extract (Hint: DNA is soluble in water, but not in ethanol). A person cannot see a single cotton thread 100 feet away, but if you wound thousands of threads together into a rope, it would be visible much further away. Is this statement analogous to our DNA extraction? Explain. Why is it important for scientists to be able to remove DNA from an organism? List two reasons. Is there DNA in your food? How do you know?
Dominador T.
14. Chilling the ethanol (isopropyl alcohol) is an important step, because it causes the DNA to be insoluble. If you let the alcohol come to room temperature the DNA will be soluble, will dissolve into the ethanol layer and be difficult to see with the naked eye. Why is this? (Hint: Ethanol is hydrophilic, and most charged molecules are hydrophilic.) 15. The DNA you have extracted looks very similar to that collected by everyone else in the lab. So then what makes each strawberry unique (ie: why is every strawberry different in shape, number of seeds, size, color, etc)?
Sri K.
Provide 5 characteristics describing the structure of DNA
Suman K.
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