lec2 - Summary 1 Eukaryotic cells keep genetic information...

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Summary 1. Eukaryotic cells keep genetic information in DNA enclosed in cell nucleus and mitochondria and chloroplasts (plants); 1. The genomes of several model organisms are completely sequenced; 3. Long DNA molecules are efficiently packed in chromosomes; 1. Cell nucleus is a highly organized structure; 2. Different sets of genes are expressed in different tissues. More about cell nucleus later…
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Lecture 2 Biochemistry and Cell Biology 1
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70% of a cell’s weight is water the most abundant substance in cells Life on Earth began in the ocean Hydrogen bond link water molecules together so that water is a liquid form at room temperature (RT) 2
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Cells contain four major families of small organic molecules They can also exist in monomers and be broken down in metabolic pathways 3
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Glucose monomer 4
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Monosaccharide to disaccharide 5
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Polysaccharide 6
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Fatty acids are usually covalently linked other molecules by their carboxyl group in a cell 7
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Lipids: a loosely defined collection of biological molecules
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