Question

4. Is the DNA extracted most likely to be nuclear DNA, mitochondrial DNA or chloroplastic DNA?
5. Give a reason for your answer in question 4.
12
6.
Explain why the methylated spirits floats above the nucleic acid(white milky cloud) and the layer
of water?
(2)​

Answer 1

Explanation:

4) As previously mentioned, one cell contains numerous mitochondria, and each mitochondrion contains dozens of copies of the mitochondrial genome. Moreover, the mitochondrial genome has a higher mutation rate (about 100-fold higher) than the nuclear genome.

5) Because it true.

6) What is the purpose of the alcohol? Why does DNA rise to the top? Alcohol is less dense than water; therefore, it floats to the top. Since cell waste is heavier, it precipitates at the bottom; and since the DNA is dissolvable in alcohol it floats to the top, forming a stringy, snotty substance on top.