Which of the following statements about genomic libraries and cDNA libraries is TRUE?
A. A genomic library is made using reverse transcriptase.
B. A cDNA library is derived from mRNA and is made using reverse transcriptase.
C. A genomic library is derived from mRNA.
D. A cDNA library is derived from chromosomal DNA.
E. A genomic library is derived from mRNA and is made using reverse transcriptase.
Answer: B
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