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All of the following are constituents of RNA molecule except _____

  • A.Thymine
  • B.Adenine
  • C.Uracil
  • D.Guanine

Answer: A

Thymine is not found in RNA.

RNA uses uracil in its place; the four RNA bases are adenine, guanine, cytosine and uracil. DNA uses adenine, guanine, cytosine and thymine. Thymine is simply 5-methyluracil.

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