DNA part 3
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This document discusses the structure and formation of DNA. It explains that DNA is made up of nucleotides connected through phosphodiester bonds. When nucleotides want to attach to form DNA, they must be in the form of triphosphates which contain energy. This energy is released during bonding between the nucleotides, creating strong phosphodiester bonds that hold the DNA chain together. Enzymes like nucleases can break these bonds, while DNAases and RNAases break down DNA and RNA, respectively.
DNA part 3
- 1. DNA part 3 Prep by :Mohamed Abdukadir Kalif Mphil in optometry
- 2. As we told on our previous lectures a nucleotide looks like the one in the picture , and many such nucleotides put together will make DNA
- 3. • Every nucleotide has two ends , one end is carbon position number 5 in which now there is phosphate attached , and the other end is carbon position number 3
- 4. • In DNA the nucleotide it contains are connected in such a way , that the carbon position number 3 end of Adenine is connected with carbon position number 5 of Guanine , and u can see in the upcoming picture
- 6. So what happens When nucleotides wants to attach with one another to make DNA
- 7. When in the cell DNA synthesis is going on , the nucleotide which are present with in the cell should be triphosphate , because the triphosphate are rich of energy they will be accepted in other nucleotides in order to make a chain of DNA
- 8. When a nucleotide of a triphosphate comes to attach with another nucleotide , energy should be released in order to create a strong bond between the two nucleotides , to make a chain of DNA
- 9. In DNA formation the nucleotides are held together by strong bonds which are created by the release of energy , these bonds are called phosphodiester bond
- 11. The enzyme which can break down the phosphodiester bond is called Nucleases
- 12. • And the enzyme which can break down the DNA is called DNAases • And the enzyme which can break down the RNA is called RNAases
- 13. • To be continued