Final answer:
The number of nucleotides in the coding sequence of a gene is indeed proportional to the number of amino acids in the protein.
Step-by-step explanation:
The statement in the question is true. The number of nucleotides in the coding sequence of a gene is indeed proportional to the number of amino acids in the protein. The genetic code is based on the fact that each amino acid is coded for by a specific series of three nucleotides called a codon.