What is the base pairs of DNA?
There are four nucleotides, or bases, in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T). These bases form specific pairs (A with T, and G with C).
Which bases pairs with cytosine?
In base pairing, adenine always pairs with thymine, and guanine always pairs with cytosine.
What are the base pairs for RNA?
RNA consists of four nitrogenous bases: adenine, cytosine, uracil, and guanine. Uracil is a pyrimidine that is structurally similar to the thymine, another pyrimidine that is found in DNA. Like thymine, uracil can base-pair with adenine (Figure 2).
What base does uracil pair with?
During the synthesis of an RNA strand from a DNA template (transcription), uracil pairs only with adenine, and guanine pairs only with cytosine.
What is purine and pyrimidine bases?
Purines and pyrimidines are the nitrogen bases that hold DNA strands together through hydrogen bonds. The purines in DNA are adenine and guanine, the same as in RNA. The pyrimidines in DNA are cytosine and thymine; in RNA, they are cytosine and uracil.
Why does cytosine pair with guanine?
Guanine and cytosine make up a nitrogenous base pair because their available hydrogen bond donors and hydrogen bond acceptors pair with each other in space. Adenine and thymine similarly pair via hydrogen bond donors and acceptors; however an AT base pair has only two hydrogen bonds between the bases.
Which RNA base bonds with cytosine?
Adenine always binds with thymine, and cytosine always binds with guanine.
Does RNA has PSPS backbone?
RNA hydrolysis is a reaction in which a phosphodiester bond in the sugar-phosphate backbone of RNA is broken, cleaving the RNA molecule. RNA is susceptible to this base-catalyzed hydrolysis because the ribose sugar in RNA has a hydroxyl group at the 2′ position.
What is uracil base?
Uracil (U) is one of four chemical bases that are part of RNA. The other three bases are adenine (A), cytosine (C), and guanine (G). In DNA, the base thymine (T) is used in place of uracil.
Which characteristic is shared by purines and pyrimidines?
Both purines and pyrimidines are similar to the organic structure pyridine, however, the purines contain one hexose and one pentose ring while the pyrimidine contains a single hexo-cyclic ring. Purines and pyrimidines both are made up of the aromatic ring having carbon and nitrogen in it.
What is the pyrimidine base?
The pyrimidine bases are thymine (5-methyl-2,4-dioxipyrimidine), cytosine (2-oxo-4-aminopyrimidine), and uracil (2,4-dioxoypyrimidine) (Fig. 6.2). Figure 6.2. Pyrimidine bases. Purine bases include adenine (6-aminopurine) and guanine (2-amino-6-oxypurine) (Fig.