BSC 1005 Lecture Notes - Lecture 5: Pyrimidine, Dna Replication, Purine
Document Summary
Nucleic acids, nucleotides, dna, rna, helix, purines, pyrimidines, All organisms pass dna to offspring when they produce. In cells, each dna molecule is organized as a chromosome. Carries part or all of a cell"s genetic info. Human cells have 46 individual chromosomes (each with it"s own dna) Genome (chromatin): are entire dna content on the cell. Dna has capacity to store genetic information, copy it, and pass it from one. To understand these phenomena, we have to understand the chemical structure generation to generation. of dna and its chemical cousin rna. In other words, dna is a polymer (polynucleotides) of many monomers. Dna and rna are nucleic acids, consist of long chains of nucleotides. Dna is a 2-stranded (double helix) structure. Each nucleotide consists of 3 main parts: A nitrogenous base with a purine or a pyrimidine. Cytosine and thymine are pyrimidines base by hydrogen bonds. A purine is connected to a pyrimidine and vice versa, to the opposite nitrogenous.
