Final answer:
The sequence of amino acids in a protein is determined by the information encoded in the RNA molecules.
Step-by-step explanation:
The sequence of amino acids in a protein is determined by the information encoded in the RNA molecules. When a cell needs to synthesize a specific protein, the corresponding messenger RNA (mRNA) is transcribed from the DNA. The sequence of nucleotide bases in the mRNA is complementary to the DNA sequence, with the base thymine (T) in DNA being replaced by uracil (U) in RNA. The mRNA then interacts with ribosomes, where it is read in sets of three bases called codons. Each codon specifies a particular amino acid, and the correct sequence of codons in the mRNA determines the sequence of amino acids in the protein.