Figure 16.2.

-Refer to Figure 16.2.The mRNA is smaller than the length of the DNA that codes for it because _____.
A)the regulatory regions (introns)of the gene are not transcribed
B)post-transcriptional modification removes the introns
C)post-transcriptional modification removes the exons
D)bases are added to the tail of the primary transcript

Question

Figure 16.2.
 
-Refer to Figure 16.2.The mRNA is smaller than the length of the DNA that codes for it because _____.
A)the regulatory regions (introns)of the gene are not transcribed 
B)post-transcriptional modification removes the introns 
C)post-transcriptional modification removes the exons 
D)bases are added to the tail of the primary transcript

Quizplus · Accepted Answer

Post-transcriptional modification removes the introns, leaving only the exons to be spliced together to form the mature mRNA. This results in a smaller mRNA molecule than the original DNA coding sequence because the introns are not included in the final transcript.

Figure 16.2. -Refer to Figure 16.2.The MRNA Is Smaller Than the Length