What is the primary difference between genomic and cDNA libraries?

• A. Genomic libraries are used to study gene expression, while cDNA libraries are used to study gene function.
• B. Genomic libraries contain DNA fragments from the entire genome, while cDNA libraries contain DNA copies of mRNA.
• C. Genomic libraries contain only coding sequences, while cDNA libraries contain non-coding sequences.
• D. Genomic libraries are created using reverse transcription, while cDNA libraries are created using restriction enzymes.

Answer: (B)