In this article we will discuss about the molecular structure of nucleic acids, explained with the help of suitable diagrams. Nucleic acids are macromolecules present in all living cells, either in free state, or in combination with proteins to form nucleoproteins. Besides, the simplest viruses consist exclusively of a molecule of nucleic acid enclosed in a protein shell. We will [...]
Glutamic acid, aspartic acid and their amides occupy an important place in the metabolism of nitrogenous compounds. We know that glutamic acid was the main entry point of ammonia into biological compounds and we will see that its metabolism is linked to that of several other amino acids; as for its amide, glutamine, it plays an important role in the [...]
In this article we will discuss about the process of biosynthesis of RNAs. The polymerization of ribonucleosides-5'-triphosphates to RNA is a process called transcription, because the genetic information carried by the DNA is transcribed into RNA. This transfer of information is based on the same principle as the duplication of DNA, i.e. the pairing of complementary bases (we will see [...]