BSC 1005 Lecture Notes - Lecture 10: Dna Replication, Pyrimidine, Purine
Document Summary
Nucleic acids, nucleotides, dna, rna, helix, purines, pyrimidines, pentose sugar, replication, All organisms pass dna to offspring when they reproduce. In cells, each dna molecule is organized as a chromosome. Chromosome: structure consisting of dna and associated proteins, carries part or all of a cell"s genetic information, eukaryotic cell have a number of chromosomes. Human cells have 46 individual chromosomes (each with its own dna). Genome (chromatin): entire dna content of the cell. Dna has capacity to store genetic information, copy it, and pass it from one generation to other generation. To understand these phenomena, we have to understand the chemical structure of dna and its chemical cousin rna. Dna and rna are nucleic acids, consist of long chains of nucleotides. In other words, dna is a polymer (polynucleotides) of many monomers. Dna is a 2-stranded (double helix) structure. Each nucleotide consists of 3 main parts. a nitrogenous base with a purine or a pyrimidine.
