Final answer:
The order of nucleotide bases in the mRNA molecule serves as instructions for the sequence of amino acids in a polypeptide. mRNA is transcribed from DNA and then translated into a protein using codons, with each codon representing a specific amino acid.
Step-by-step explanation:
True, the sequence (or order) of the nucleotide bases in the mRNA molecule is the set of instructions that dictates the order in which amino acids should be joined to form a polypeptide. The cellular process of transcription generates messenger RNA (mRNA), which carries the genetic blueprint from DNA using an alphabet that includes adenine (A), cytosine (C), guanine (G), and uracil (U), instead of thymine (T) found in DNA. During translation, the mRNA template is used to assemble a specific sequence of amino acids and create a protein product. This sequence is determined by three-nucleotide groups known as codons, each of which corresponds to a specific amino acid or a start/stop signal in the process of protein synthesis.
Furthermore, it is essential to note that the genetic code is nearly universal and that each amino acid can be encoded by more than one codon. However, no codon encodes for more than one amino acid, ensuring the precise translation of the mRNA message into a protein sequence.