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charliemagne
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What is in DNA why can it not read the uracil nitrogenous base during transcription? May I have answer in the molecular level?
Uracil is a nitrogenous base that is one of the four building blocks of DNA. It is a single-ring structure and is classified as a pyrimidine base.
Uracil is different from other nitrogenous bases because it is only found in RNA, not DNA. In DNA, thymine replaces uracil. Additionally, uracil does not form hydrogen bonds with adenine like thymine does, but it still pairs with adenine in RNA through other types of bonds.
During DNA transcription, uracil replaces thymine in the newly formed RNA strand. This allows the genetic code to be accurately copied and transferred from DNA to RNA, which is essential for protein synthesis.
If a uracil is mistakenly inserted into DNA, it can cause a mutation. This is because uracil does not pair with guanine like thymine does, leading to an incorrect base pairing and potentially causing a change in the genetic code.
Yes, uracil can be converted into other nitrogenous bases through a process called deamination. This happens when an enzyme removes an amino group from uracil, resulting in the formation of cytosine. This can lead to mutations if not corrected by DNA repair mechanisms.