There are three; cytosine, thymine and uracil.
Cytosine, thymine and uracil are the pyrimidines in animal usage.
Pyrimidines are the single ringed structures-Cytosine and ThyminePurines are the double ringed structures- Adenine and Guanine.
The two classes of nitrogenous bases are purines and pyrimidines. Purines include adenine and guanine, while pyrimidines include cytosine, thymine, and uracil.
Adenine and Guanine are the two classes of nitrogenous bases that belong to purines.
Adenine, guanine, and cytosine are classified as nitrogenous bases, which are the building blocks of nucleotides that make up DNA and RNA molecules. These bases pair up in specific combinations to form the genetic code.
Thymine and cytosine.
Cytosine, thymine and uracil are the pyrimidines in animal usage.
Pyrimidines are the single ringed structures-Cytosine and ThyminePurines are the double ringed structures- Adenine and Guanine.
The two classes of nitrogenous bases are purines and pyrimidines. Purines include adenine and guanine, while pyrimidines include cytosine, thymine, and uracil.
Purines and Pyrimidines
Nitrogenous bases are categorized into two groups: pyrimidines (cytosine, thymine, and uracil) and purines (adenine and guanine).
Adenine and Guanine are the two classes of nitrogenous bases that belong to purines.
Nitrogen containing bases
Adenine and Guanine belong to the class of nitrogenous bases called purines. They are characterized by a double-ring structure that includes both a six-membered ring and a five-membered ring. These purine bases play a crucial role in the structure of DNA and RNA molecules.
Plato users D. Thymine, cytosine
Cytosine and thymine are the nitrogenous bases used in DNA. Uracil substitutes for thymine in RNA.
Thymine is a single-ringed nitrogenous base.