The category of nitrogen bases that consists of two rings is the purines.
A nitrogenous base is an organic compound that owes its property as a base to the lone pair of electrons of a nitrogen atom. Notable nitrogenous bases include purines.
Purines have two fused rings of carbon and nitrogen atoms.
There are naturally occurring rings, like tree rings and the rings of Saturn.
The rings in a tree are for the tree's 'age'If you counted up the rings that would be the age of the tree.The dark thinner rings are slow growing wood from dry seasons and the lighter broader rings the wet seasons. If you count the dark rings, you are counting how old in years the tree was.
The rings were first seen by Galileo and were confirmed by Huygens. Scientific advancements in the 80’s allowed for the Voyager to get better images of the rings. By 2006, the Cassini probe showed faint rings never seen before.
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Moving outwards from one dark ring to other, increase of path difference by lambda,corresponding increase of thickness of air layer by lambda/2. since the the slope of the lens increases outwards, separation of rings get smaller for outer rings
The large bases that have two carbon-nitrogen rings are called purines.
Nitrogen bases are made up of hydrogen bonds, phosphate, and sugar
purines
pyrimides
These rings are known as pyrimidines.
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If you mean the rungs of the twisted ladder model, they are made of the nitrogen bases of both strands held together by hydrogen bonds.
Thymine and cytosine are two nitrogen bases found in DNA. DNA is composed of thousands of nucleotides which are composed of one of four nitrogen bases. Both of these nitrogen bases are also pyrimidines, or they have one ring like structure See related link for more info on thymine, cytosine and pyrimidines.
Essentially, yes. Chlorophyll contain four pyrrole rings known as a porphyrin ring, which are linked to each other by methane bridges. Each of these pyrrole rings consists of five atoms - four carbon and one nitrogen. The nitrogen atom has magnesium in the center, as the nucleus. Magnesium functions as an enzyme cofactor during photosynthesis, making it particularly important to the production of ATP
Nitrogen Base
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