adenine and cytosine
guanine and adenine
The nitrogenous substances A and G are purines (double rings).
There are three; cytosine, thymine and uracil.
adenine----The four nitrogenous bases that comprise DNA are adenine, guanine, thymine, and cytosine. there are four kinds of nitrogenous bases in dna. two of the nitrogenous bases, adenine and guanine,belong to a group of compounds known as purines. the remaining two bases, cytosine and thymine, are know as pyrimidines. Adenine pairs up with thymine, and cytosine pairs up with guanine. Humans also use a fifth base in RNA called uracil. In the case of RNA, thymine is replaced by uracil and other three bases remains the same. All of these bases are attached to the sugar and phosphate. The double helix maintains a constant width because purines always face pyrimidines in the complementary A-T and G-C pairs. And they are all connected by a phosphorous base. A-T; G-C The phosphorous base can be broken for DNA replication purposes.
The large bases that have two carbon-nitrogen rings are called purines.
A pentose joined to a nitrogenous base and a phosphate group is called anucleotide. Nucleotides are building blocks of nucleic acids.
what belongs to the class of nitrogenous bases called purines
Guanine and Adenosine
Purines and pyrimidines.purines contain adenine,guanine,hypoxanthine and xanthine.pyrimidines contain uracil,thymine,cytosine,orotic acid
Four, out of whish 2 purines and two pyremidines
The nitrogenous substances A and G are purines (double rings).
The two purines are adenine and guanine. The two pyrimidines are thymine and cytosine. Uracil (only in RNA) is also a pyrimidine.
The two DNA bases Adenin and Guanine belong to the group called Purines.
Plato users D. Thymine, cytosine
Purines
Theyre pyrimidines Because Adenine and guanine both have two and cytosine and thymine have one.
Adenine and guanine are both double ringed purines.
adenine----The four nitrogenous bases that comprise DNA are adenine, guanine, thymine, and cytosine. there are four kinds of nitrogenous bases in dna. two of the nitrogenous bases, adenine and guanine,belong to a group of compounds known as purines. the remaining two bases, cytosine and thymine, are know as pyrimidines. Adenine pairs up with thymine, and cytosine pairs up with guanine. Humans also use a fifth base in RNA called uracil. In the case of RNA, thymine is replaced by uracil and other three bases remains the same. All of these bases are attached to the sugar and phosphate. The double helix maintains a constant width because purines always face pyrimidines in the complementary A-T and G-C pairs. And they are all connected by a phosphorous base. A-T; G-C The phosphorous base can be broken for DNA replication purposes.