GBSN - Biochemistry (Unit 7) Nucleic acid and nucleotide

Nucleic acid and nucleotide

1. Biochemistry Lecture GBSN (Unit 7 ) Nucleic acid and nucleotide by, Miss Areesha Ahmad Lecturer

2. The structure of Ribose and Deoxyribose is almost identical, with just one difference. Ribose sugar has a hydroxyl (OH) group at position 2, whereas deoxyribose sugar has a hydrogen (H) atom at position 2. Due to this, deoxyribose sugar is more stable than ribose sugar.

3. A heterocyclic compound or ring structure is  a cyclic compound that has atoms of at least two different elements as members of its ring

4. Nucleosides are  biomolecules that are made up of a five-carbon sugar and a nitrogenous base Example: Adenosine, guanosine . A β- glycosidic bond forms a nucleoside by  linking the carbon 1' of a five-carbon sugar to the nitrogen 9 of a purine or nitrogen 1 of a pyrimidine .

5. DNA Structure

6. In DNA, adenine (A) always binds to thymine (T) using two hydrogen bonds. W hile   guanine binds to cytosine using three hydrogen bonds

7. Adenine (A) always binds to thymine (T) using two hydrogen bonds while   guanine binds to cytosine using three hydrogen bonds

8. Assignment