Multiple choice Which of the following chemical bases is not a part of RNA? 6-aminopurine 2-oxy-4-amino-pyrimidine 2, 4-dioxypyrimidine 2, 4-dioxy-5-methylpyrimidine 2-amino-6-oxypurine Reveal answer Fill a bubble to check yourself D Correct answer Explanation Thymine (2, 4-dioxy-5-methylpyrimidine) is not a part of RNA.