Instead of Thymine, there's Uracil.
DNA has ACGT
RNA has ACGU. so uracil instead of thymine.
The correct answer is uracil.
Uracil is a nitrogen base that is found in the RNA and not in the DNA, which has thymine. The three other nitrogen bases are the same ( Adenine, Guanine and Cytosine).
Besides the difference in the nitrogen bases, the two molecules also differ in the sugar that builds the structure ( DNA has desoxyribose and RNA has ribose) and the DNA is a two stranded helix, whereas the RNA is a single stranded molecule.
Uracil is found in RNA but is not found in DNA.
Uracil is not found in DNA, only RNA, and replaces thymine in RNA
Uracil is present in RNA and binds to adenine whereas thymine is present in DNA and binds to adenine.
Uracil is the nitrogenous base that exists in RNA but is absent in DNA.
Uracil or uracil is a nitrogenous base. Represented by the letter U in the genetic code, it is a simple, pyrimidine ring base capable of making two hydrogen bonds, just like thymine. It replaces thymine in DNA to RNA transcription to complement adenine. It is an exclusive base of RNA, that is, it does not occur in DNA.
Uracil is the nitrogenous base which exists in RNA but not in DNA.
DNA has thiamine instead of uracil. It is believed that Uracil was replaced by thiamine in DNA because thiamine can be detected by DNA repair machinery more efficiently in case of any DNA damage. So, thiamine was accepted as normal nitrogenous base in DNA.
DNA is a hereditary material therefore it needs to be repaired at any cost because if it will not be repaired on time it will pass on to the next generation in damaged condition which will lead to mutations in the progeny. RNA on the other hand does not serve the function of hereditary material in most of the organisms therefore it does not need to be repaired.
The reason why thiamine did not replace uracil in RNA is because it's synthesis is energetically less expensive than thiamine so nature decided to retain it but only in RNA.
Uracil is the nitrogenous base that is found in RNA but not present in DNA.
Cytosine (C) and thymine (T) are the smaller pyrimidines. RNA also contains four different bases. Three of these are the same as in DNA: adenine, guanine, and cytosine. RNA contains uracil (U) instead of thymine (T).