When an extra nitrogenous base is inserted into the DNA sequence of a gene, the protein product of the gene is usually nonfunctional. Which of the following statements best explains why it is nonfunctional? The inserted base causes the DNA sequence to be transcribed into the RNA sequence in the opposite direction.
The inserted base increases the rate of translation in the corresponding mRNA sequence.
The inserted base causes the codons in the mRNA sequence to be incorrect for the desired protein.
The inserted base signals enzymes to translate the DNA sequence instead of the RNA sequence into the protein.