BI236 Lecture Notes - Lecture 4: Mitosis, Deoxyribose, Deoxyribonucleotide

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15 Jan 2017
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Lecture 4 the structural basis of cellular information, dna, chromosomes, and the nucleus jan 11th. 3. 2 billion base pairs in every cell build the human genome. Genes from only 1. 5% of the human genome. A gene is a segment of the dna that encodes for a protein in humans there are 30,000 genes (we know about) Many genes, regulatory elements and other intervening nucl eotide sequences. Eukaryotic chromosomes structurally complex as dna is associate with high amounts of proteins. 2 sex chromosomes x and y. Chrome 21 and 22 smallest (least genes) Human genome project 1st one sequenced is the smallest one (22) Different animals have different number of chromosomes. # chromosomes has nothing to do with the complexity of the organism. Flow of info within a cell: dna rna protein. Flow of info between generations of cells: dna synthesis (replication) mitosis.

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