Nucleotide sequences of a gene that code for protein products (as opposed to noncoding regions) are known as
A) mRNA.
B) introns.
C) exons.
D) codons.

Question

Quizplus · Accepted Answer

Nucleotide sequences of a gene that code for protein products are known as exons. Exons are the parts of the gene that are transcribed and translated into amino acids, which ultimately form the protein product.

Option A (mRNA) refers to the RNA molecule that is transcribed from the DNA sequence and carries the genetic information to the ribosome for translation.

Option B (introns) are noncoding regions that are transcribed from DNA but are spliced out of the final mRNA molecule and do not contribute to the protein product.

Option D (codons) are the three-letter genetic code words that correspond to specific amino acids during translation, but are not specific to coding regions of the gene.

Nucleotide Sequences of a Gene That Code for Protein Products