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In DNA and RNA, cytosine is paired with guanine. However, it is inherently unstable, and can change into uracil (spontaneous deamination). This can lead to a point mutation if not repaired by the DNA repair enzymes such as uracil glycosylase, which cleaves a uracil in DNA.
Cytosine, a nitrogenous base derived from pyrimidine that occurs in nucleic acids, the heredity-controlling components of all living cells, and in some coenzymes, substances that act in conjunction with enzymes in chemical reactions in the body.
27 Αυγ 2021 · In DNA and RNA, cytosine matches with guanine forming three hydrogen bonds. Cytosine, though, is relatively unstable and can be converted into uracil (via spontaneous deamination). This alteration can be corrected by DNA repair systems such as by the use of the enzyme uracil glycosylase. If not repaired, this may lead to a point mutation.
15 Μαΐ 2022 · The rules of base pairing explain the phenomenon that whatever the amount of adenine (A) in the DNA of an organism, the amount of thymine (T) is the same (called Chargaff's rule). Similarly, whatever the amount of guanine (G), the amount of cytosine (C) is the same.
In DNA, cytosine pairs with guanine through three hydrogen bonds, forming a stable base pair. The sequence of these base pairs along the DNA strand encodes genetic information. During DNA replication, the complementary base pairing ensures faithful copying of the genetic material.
5 Μαρ 2024 · Cytosine is one of the four main nitrogenous bases found in DNA and RNA. It pairs with guanine. Cytosine plays a crucial role in genetic coding and the transmission of genetic information.
17 Μαρ 2022 · Base-pairing takes place between a purine and pyrimidine: namely, A pairs with T, and G pairs with C. In other words, adenine and thymine are complementary base pairs, and cytosine and guanine are also complementary base pairs.
