If you compared the DNA sequence of a gene with the sequence of the mature mRNA that was transcribed from the gene you would find

Question

Quizplus · Accepted Answer

The mRNA is shorter than the gene because it does not contain introns, which are non-coding regions of DNA that are transcribed into pre-mRNA but are removed during RNA processing to produce mature mRNA. Therefore, the mature mRNA sequence only contains the exons, which are the coding regions that encode the amino acid sequence of the protein. Each codon in the mRNA still consists of three bases, so option C is incorrect. Option A is also incorrect because although each codon encodes only one amino acid, this does not affect the length of the mRNA sequence. Option D is incorrect because the mRNA is usually shorter than the gene. Option E is incorrect because exons are included in the mature mRNA.

If You Compared the DNA Sequence of a Gene with the Sequence