Asked by: Ming Siehmann
asked in category: General Last Updated: 20th March, 2020

What are the bases found in DNA and RNA?

In DNA, there are four different bases: adenine (A) and guanine (G) are the larger purines. 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.

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Also asked, what are the base pairings in DNA and RNA?

The base pairing of guanine (G) and cytosine (C) is just the same in DNA and RNA. So in RNA the important base pairs are: adenine (A) pairs with uracil (U); guanine (G) pairs with cytosine (C).

Secondly, where are the bases located in an RNA molecule? The bases are located inside the helix and form the base pairs adenine and thymine or guanine and cytosine, which are linked by hydrogen bonds.

Then, what base is found in RNA but not DNA?


Why is RNA unstable?

RNA is susceptible to alkaline hydrolysis because the ribose sugar in RNA has a hydroxyl group at the 2' position, which makes RNA chemically unstable compared to DNA (DNA has hydrogen at the 2' position). DNA is stable in alkaline conditions. The RNA base, uracil, lacks this methyl group.

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