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A geneticist isolated a gene for a specific traits under study, she also isolated the corresponding mRNA. Upon comparison, the mRNA was found to contain 1,000 fewer bases than the DNA sequence. Did the geneticist isolate the wrong DNA ?

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Yes, mRNA is made from a DNA template and should be the same length as the gene sequence.

Yes, the mRNA should contain more bases than the DNA sequence because bases flanking the gene are also transcribed.

No, the mRNA was partially degraded after it was transcribed.

No, the final mRNA contains only exons, the introns were removed during the processing.

answer is C.

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Detailed Solution

The mRNA formed after transcription of a gene was shorter than the DNA because the intervening sequences called introns were removed through splicing.

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