How many nucleotides are involved/needed in the synthesis of a protein that contains 331 amino acids?

Question

Can you please explain how you get the answer!!? Do you count the stop codon since you don't have match for it?

Answer 1

It looks like the key is whether or not to count the stop codon. Personally, I would; if I wasn't certain and it was for a test question, I would phrase it something like "X nucleotides for the protein itself, + 3 for the stop codon." That way you're covered both ways, and you've shown you know what the question is designed to find out.
(I'm assuming, by the way, that you know that each amino acid is coded for by 3 nucleotides)