These facts show that there are serious deviations from of the Watson
and Crick model in its initial form. The numerous unclear problems concerning
chromatin, the structural organization of the chromosomes and the different
genomes as a whole, the packing of the DNA-molecule by proteins, the
heterogeneous character of DNA and RNA with repeated nucleotide
sequences and satellite DNA, the reverse transcriptase, the differences in the
replication of the two chains, the interrupted gene structures, the mobile (IS)
elements, etc. render an opportunity for deep consideration. With the
postulation of the Central dogma in biology a transition from one extreme —
the leading role of proteins and environment, the inheritance of acquired
features in the process of development and vegetative hybridization for
changing hereditary features of organisms supported by T. D. Lysenko and his
followers with the denouncement of the objective regularities of Mendel,
Weissmann and Morgan laid the foundations of the chromosome theory, to
the other extreme — the positioning of DNA as fetish and placement of
proteins and RNA as secondary serving components. Where is the truth? The
servitude to dogmas is bad for science, especially biology. This problem must
be treated in the light of its evolutionary development and in this way to clarify
the origin, role and interactions between proteins and nucleic acids, otherwise
it would continue to give rise to “hot” discutions among the researchers in this
field.
Carbohydrates
Carbohydrates are the third basic component that participates in building
and functioning of unicellular and multicellular organisms. They constitute
about 80% of the dry mass of plant organisms and 2% of animal ones. In
contrast to nucleic acids and proteins, their biological role is less important
— they are sources of energy for realizing the metabolic processes and
components of cell membranes and tissues.
Sugars is a synonym of carbohydrates. They are: monosaccharides,
with a general formula (CH₂O)n, where n designates the number of C
atoms and can be every integer from three to eight; oligosaccharides,
containing from two to ten monosaccharide units connected with glucoside
bonds; polysaccharides — long chain built by a number of repeated
monosaccharide residues. Polysaccharide chains can be as linear, as well
as branched. Their molecular weight varies from a few thousand to 1
million.
Carbohydrates are built of only three chemical elements — carbon (C),
hydrogen (H) and oxygen (O). Each monosaccharide contains hydroxyl
