If the sequence of a cDNA has matches with DNA sequences in the genome, then this genomic DNA is likely to ________.
A) code for a protein
B) code for a ribozyme
C) code for an rRNA
D) be part of an intron
E) be a regulatory sequence

Question

Quizplus · Accepted Answer

If a cDNA sequence matches with a genomic DNA sequence, it suggests that the genomic DNA is coding for a protein. C, D, and E are less likely as cDNA is primarily derived from mRNA, which does not contain non-coding or regulatory sequences, or introns. B is unlikely as ribozymes are RNA molecules that have enzymatic functions, and cDNA would not be able to capture RNA molecules. Therefore, the best answer is A.

If the Sequence of a CDNA Has Matches with DNA