All amino acids have a similar structure. which component is responsible for the differences in the 20 amino acids. A the r group
B the carboxylic acid
C the central atom
D the amine group

your answer is true

i am 100% sure

explanation:

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides

69 is the correct math for the amino acids