AP BIOLOGY

Detailed explanation-1: -But three DNA letters provide more than enough combinations to code for all twenty amino acids. So three was the answer. It was a triplet code.

Detailed explanation-2: -So hence the answer to the question is 10 amino acids in turn can be generated using these 30 nucleotide gene sequence it.

Detailed explanation-3: -Four nucleotides together form almost 64 different combinations if taken three at a time. Out of these 64 combinations, if we remove 3 stop codons such as TAA and others, we are left with 61 combinations encoding for 20 different amino acids.

Detailed explanation-4: -While one might quickly calculate that 90 nucleotides/3 would yield a 30 amino acid sequence, it is important to remember that while the first 3 nucleotides will encode for an amino acid to start translation (methionine), the last 3 nucleotides do not.