A eukaryotic gene contains 5 exons, each 150 base pairs (bp) long, separated by 4 introns, each 90 bp long. This gene is transcribed into pre-mRNA, which then undergoes splicing to produce mature mRNA.

During translation, the entire coding region of the mature mRNA is translated, starting at the first nucleotide and ending at a stop codon formed by the final 3 nucleotides.

How many amino acids will be present in the resulting polypeptide chain?