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final review - Bio Lab Review Lab 1 Conducting Solutions...

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Bio Lab Review
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Lab 1: Conducting Solutions Ionic solutions-are made up of ions Molecular solutions-are made up of molecules Balancing equations: MgCl 2 Mg 2+ +2Cl - (magnesium chloride) C 4 H 10 OH-->C 4 H 10 OH (carbohyde) Na 2 SO 4 2Na + +SO 4 2- (sodium sulfoxide) C 12 H 22 O 11 C 12 H 22 O 11 (sucrose)
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Lab 2: Effect of Alcohols on Biolgoical Membranes Beet vacuole-tonoplast Pigment inside tonoplast-betacyanin Leaks in response to treatment of various alcohols because the beet membranes have been damaged. Alcohol/concentration that damaged membrane most-propanol 12% Zero a spec-left button (%T) to 0, get blank (or distilled water), turn 100%T to 100, mode absorbance Blank a spec- Positive control-anything that you know will give a positive result Negative control-anything you know will give a negative result
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Lab 3: Biological Membranes Effect of osmotic balance/detergents/pH on membranes-destroys them when changed from normal amounts of pH, detergents always destroy so does osmotic changes How is damage measured- Results? Osmosis-the movement of water across a semi-permeable membrane from a region of low solute concentration area of higher solute concentration
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