[Answer] The sequence of DNA below is part of a gene. How many amino acids are coded for by this segment? 5′ ATCAGCGCTGGC 3’A. 4B. 8C. 12D. 20

Answer: A. 4 Each section of three nucleotides (called a triad) codes for one amino acid. Since there are four triads here this piece of DNA codes for 4 amino acids.