Which of the following is a correct statement?

a. If you want to make a cDNA library, it doesn't matter which tissue you isolate the mRNA from.
b. If you want to make a genomic library, it doesn't matter which tissue you isolate the DNA from.
c. If you want to make a cDNA library, it doesn't matter which tissue you isolate the DNA from.
d. If you want to make a genomic library, it doesn't matter which tissue you isolate the mRNA from.

Option-B

Explanation:

The cDNA and genomic DNA are two types of DNA which are synthesized by humans in vectors for various purposes.

Complementary DNA is a DNA sequence obtained when the formed mRNA is reverse transcribed by the reverse transcriptase enzyme and results in the complementary DNA. The mRNA is derived from the specific cell in which the mRNA is expressed.

The genomic DNA is a type of DNA synthesized from the DNA of an organism. For this purpose, the DNA from any cell of the body can be extracted as the same genome is equally distributed in the organism.

Thus, Option-B is correct.

c

explanation:

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: