How many nitrogenous bases are found in DNA?
In DNA, there are four nitrogenous bases
In DNA, there are four nitrogenous bases. These bases are known as adenine (A), guanine (G), cytosine (C), and thymine (T). These bases play a fundamental role in the structure and function of DNA.
Adenine (A) and guanine (G) are classified as purine bases, characterized by a double ring structure. Cytosine (C) and thymine (T), on the other hand, are known as pyrimidine bases and possess a single ring structure. The pairing of these bases forms the basis of DNA’s double helix structure.
The nitrogenous bases pair in a specific manner: adenine (A) always pairs with thymine (T) through two hydrogen bonds, and guanine (G) always pairs with cytosine (C) through three hydrogen bonds. This complementary base pairing is crucial in DNA replication and genetic information transfer.
To summarize, DNA contains four nitrogenous bases – adenine (A), guanine (G), cytosine (C), and thymine (T) – which are responsible for the genetic information storage and transfer in all living organisms.
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The Importance of Complementary Base Pairing in DNA Replication and Protein Synthesis