Why Thymine is present in DNA instead of Uracil?

Point 1

• Thymine is made from uracil in a methylation cycle. The methylation process is the expansion of a methyl bunch(CH₃) to a molecule.
• Methylation is completed by DNA methyltransferase. Most methylated nucleotides are in the coding district of DNA minimal in the advertiser area.
• Becoming methylated makes the DNA “imperceptible” to nucleases (compounds that separate DNA and RNA). Infections, microbes, and different intruders can’t obliterate the DNA utilizing the nucleases, assuming that DNA is methylated.

Point 2

Particularity in Base Matching

Uracil has more base pair liking to adenine, however, it can likewise match up with different bases including itself. This can prompt changes in our hereditary material. In the event that uracil is utilized as a corresponding base, it very well may be changed during DNA replication and consequently can code for various amino acids and might be for a non-useful protein. By attaching it down to a solitary conformity, the methyl bunch limits uracil (thymine) to matching just with adenine. This incredibly works on the proficiency of DNA replication, by lessening the pace of confounds, and accordingly changes.

Point 3 

Cytosine Deamination

Cytosine can deaminate to create uracil, the main distinction between them is O in uracil and a NH2 in cytosine. That’s what the issue is, assuming uracil were a part of DNA, the maintenance frameworks wouldn’t have the option to recognize unique uracil from uracil began by deamination of cytosine. So utilizing thymine rather makes it way simpler and more steady, as any uracil inside DNA should come from a cytosine thus it tends to be supplanted by another cytosine.

Point 4

Bright light reasons thymine dimers together in DNA, thusly on the off chance that uracil was available in DNA, these uracil dimers wouldn’t be perceived by nucleotide extraction fix.

DNA is a micromolecule that consists of many subunits it’s connected together. Those subunits knew as nucleotides. The DNA provides replication and information storage. DNA is described as deoxyribonucleic acid generally it is a polymer of deoxyribonucleotides it’s found in chromosomes, mitochondria chloroplast. It has a double-stranded structure and it acts as genetic material in most organisms they carry the genetic information from one generation to another generation. In 1953, James Watson and Francis crick described as DNA a double helix structure.