Sequences of genomic DNA, and its corresponding messenger RNA (mRNA) , are often compared to obtain valuable information for genome annotation. Why is this comparison useful?
A) The open reading frame of the mRNA includes the introns of the genomic DNA.
B) The exclusion of introns in mRNA reveals the intron-exon structure of many protein coding genes.
C) The genomic DNA is longer because the exons are spliced together.
D) The genomic DNA is shorter because the exons are spliced together.
E) The sequences of genomic DNA and mRNA are identical, which serves as independent validation.
Correct Answer:
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