Unit 2

Apuntes

Unit 2 Molecular genetics 4º ESO Biology and Geology 1 In this unit • DNA (and RNA) • Molecular genetics • Genetic code • Mutations 2 But before we start... 3 (H3PO4) (5 C monosaccharides) 4 Structure of nucleic acids 1. Nucleic acids Unit 2. Molecular genetics NUCLEOTIDE RNA nucleotide DNA nucleotide 5 Structure of nucleic acids 1. Nucleic acids Unit 2. Molecular genetics 6 Video up to 1: 36 https://www.youtube.com/watch?v=IV53GZGr11g 7 Structure of nucleic acids 1. Nucleic acids Unit 2. Molecular genetics 8 Structure of nucleic acids 1. Nucleic acids Unit 2. Molecular genetics RNA nucleotide DNA nucleotide 9 DNA RNA Chemical composition Formed by deoxyribonucleotides, which are made up of: - Phosphate - Deoxyribose - Nitrogenous bases: adenine (A), guanine (G), cytosine (C) and thymine (T) Formed by ribonucleotides, which are made up of: - Phosphate - Ribose - Nitrogenous bases: adenine (A), guanine (G), cytosine (C) and uracil (U) Structure of nucleic acids 1. Nucleic acids Unit 2. Molecular genetics 10 DNA RNA Molecular structure Two polynucleotide molecules joined by their nitrogenous bases: double-stranded structure. A polynucleotide molecule: single-stranded stru...