in lithium (Li): Chemical properties. 1  Lithium hydroxide (LiOH), commonly obtained by the reaction of lithium carbonate with lime, is used in making lithium salts (soaps) of stearic and other fatty acids; these soaps are widely used as thickeners in lubricating greases.
Cytosine, thymine, and uracil are examples for pyrimidine bases. Adenine and guanine are the two purine bases. DNA has adenine, Guanine, cytosine, and thymine bases, whereas RNA has A, G, C, and uracil (instead of thymine).In DNA and RNA, complimentary bases form hydrogen bonds between them.That is adenine: thiamine/ uracil and guanine: cytosine are complimentary to each other.hey have the following structures. In nucleic acids, purine groups make hydrogen bonds with complementary pyrimidine bases. That is adenine makes hydrogen bonds with thymine and guanine makes hydrogen bonds with cytosine. IN RNA, since thymine is absent, adenine makes hydrogen bonds with uracil.
Purines and pyrimidines are biochemical compounds that the body uses for a number of functions. Most notably, DNA and RNA -- the molecules responsible for the genetic code and protein synthesis -- contain purine and pyrimidine derivatives, known as nucleobases.