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 [...]
The metabolism of carbohydrates, lipids, nucleic acids and proteins, but we have already underlined the fact that this division is rather arbitrary; it is justified mainly because it facilitates the presentation. In fact — as observed repeatedly — inter-relations between various types of compounds are numerous and the entire cellular metabolism must be regarded as a set of harmoniously integrated [...]