DNA’s model structure of Waston-Crick show that a DNA molecule exists in the form of a three-dimensional double helix which consists of two chains are antiparallel with four different types of nitrogen bases. Their observation that two complementary strands linked in a directional chain: beta N-glycosidic bond connects the deoxyribonucleic acid to the nitrogen base, a phosphodiester bond connects one nucleotide to the next and the sugar phosphate backbone is identical in every DNA molecule. The DNA molecule is made of four chemical building blocks ( or the four bases A, C, G, T) attached sugar and phosphate groups linked together to form the chemical polarity double helix, polynucleotide chains. The complementary base pairing makes two chains…show more content… The main functions of RNA viruses that heredity and programming the functioning of the cell and on other molecule fulfills these functions. In fact, the ribosome is one of the important structures in the cell that is effective of making protein and it is formed by RNA and proteins. Obviously, genes composed of protein even it has twenty different subunits which are greater potential variety of combinations. In the course of elaborating the process, from the nucleotide sequence of a gene to the amino acid of a protein through the translation process and only by some way only that gene read out sequenced in several steps.
The Hershey and Chase experiment evidence that the genetic material of the phage is DNA, not protein. By using bacteriophage, the type of virus that have simple structure (an outer core and an inner component) can be high-speed blended from bacterial cells after adsorption. In this case, because of DNA contains phosphorus (P) but no sulfur (S) so using radioactive labels phosphorus (32P) for phage DNA, conversely, protein lack P but does have S, thus is could be radioisotope of sulfur (35S) for proteins of a separate phage culture. Their
