A protein is 300 amino acids long. Which of the following could be the number of nucleotides in the section of DNA that codes for this protein? (Remember: DNA is double -stranded.)

Question

Quizplus · Accepted Answer

Each amino acid is coded by a codon, which consists of 3 nucleotides. Therefore, a protein with 300 amino acids would require 300 x 3 = 900 nucleotides. Since DNA is double-stranded, the section of DNA would also be 900 nucleotides long, but the total number of nucleotides in both strands would be 1800.

A Protein Is 300 Amino Acids Long