Question
Biology Question on biotechnology
During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out
A
DNA
B
Histones
C
Polysaccharides
D
RNA
Answer
DNA
Explanation
Solution
In recombinant DNA technology, when chilled ethanol is added to the solution containing the DNA of interest, the DNA molecules become insoluble and form a visible white precipitate. This occurs because DNA is not soluble in cold ethanol. This precipitation step allows the separation and purification of DNA from other cellular components and contaminants in the sample.
Therefore, The correct option is (A): DNA