Kobe, Kyle. Nucleic Acids Note. Accessed March 31 2014.
The video that was viewed was about nucleic acids. They are the blueprints for the building of DNA. There are two types of nucleic acids: Ribonucleic acids (RNA), it is a single helix which is one chain of nucleotides and Deoxyribonucleic acids (DNA), it is a double helix which is two chains of nucleotides. They are composed of nucleotides which bond together to form the nucleic acid polymer, nucleotides are comprised of three parts a sugar molecule, phosphate group and one out of four nitrogenous bases. The four different types of nitrogen bases are Adenine, Thymine, Cytosine and Guanine, the first letters of each base are used to symbolize them. Erwin Chargaff discovered that Adenine pairs with Thymine and Cytosine pairs with Guanine and this was called Chargaff’s rule, the bonding between each pair holds the double helix by hydrogen bonds. RNA on the other hand has the bases as DNA except in place of Thymine it has Uracil, RNA’s main function is to deliver the instructions from DNA to the ribosome. Nucleotides bind together by a process known as dehydration synthesis, as water is lost when the phosphate group on one nucleotide bonds with the sugar on another nucleotide, a process called hydrolysis reverses the bond of the nucleotides because it adds water.
This sums up the content of the video which was very brief as was a simple introduction to nucleic acids. The video was very informative even though it was just an introduction but it touched on some vital points that would give a person a good foundation to move forward into a more advanced look at nucleic acids. The video also had a good interactive side to it as well were there were questions at intervals of information and at the end it contained a detailed review question sheet to recap the information learnt in the video.