ch.5 notes slideshow - Interactions between different...

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O CH 2 OH H H H OH OH H H HO OH 1 b- Glucose H H H H H b -Galactose b configuration + Lactose b linkage H H H H H H H H b glycosidic linkage - Production of lactase (for hydrolysis of lactose to glu + gal) naturally decreases from infancy to adulthood. - Major deficiency of lactase production in adults and is hereditary: Approx. 75% of people worldwide have a decrease in lactase as they approach adulthood. Lactose intolerance Lactase
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Fig. 5-6 Glycogen: an animal polysaccharide Starch Branches every 10 Amylose Chloroplast Starch: a plant polysaccharide Amylopectin Branches every 30 Mitochondria Glycogen granules 0.5 μm 1 μm
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Cellulose and roughage in humans -Cellulose is difficult to digest; requires the enzyme, cellulase -Humans do not produce cellulase; cellulose contributes to roughage due to its undigested fibers that pass thru the gut (dietary fiber) Cattle (ruminants) have cellulase-producing bacteria in their gut Termites cannot digest cellulose; require presence of cellulase- producing bacteria in their gut Symbiosis
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Unformatted text preview: Interactions between different biological species Major source of bad (trans) fats Most naturally-occurring vegetable oils are cis fats If these oils are heated and reused (e.g., for frying) cis convert to trans fats Evidence suggests trans fats are carcinogenic and contribute to atherosclerosis. Hydrogenated vegetable oil is a commercial product artificially converted to unsaturated fats with addition of hydrogens to trans C = C double bonds BAD STUFF! (thereby generating trans fats)-unsaturated Fig. 16-5 Sugarphosphate backbone 5 end Nitrogenous bases Thymine (T) Adenine (A) Cytosine (C) Guanine (G) DNA nucleotide Sugar (deoxyribose) 3 end Phosphate Covalent Bond Between phosphate group and OH of 3C Phosphodiester bond Substrate for DNA synthesis: DNA nucleotides tri-phosphates Phosphodiester bond Fig. 16-7 Hydrogen bond 3 end 5 end 3.4 nm 0.34 nm 3 end 5 end 1 nm...
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This note was uploaded on 11/13/2011 for the course BIOLOGY 1132 taught by Professor Shannon during the Spring '10 term at Texas San Antonio.

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ch.5 notes slideshow - Interactions between different...

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