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BZ 310- Lab Final
| Question | Answer |
|---|---|
| three levels of cell cultures | culture, subculture, cell line |
| cell counting | dilution x 1000 x (cells counted)/(mL) |
| .025%= | .25mg/mL |
| freezing medium contains what and why? | DMSO to prevent freezing damage |
| growth medium | Grace's medium, 10% bovine serum |
| three growth phases | lag, log, plateau |
| three things used to prevent contamination | laminar flow cabinets, 70% ethanol, UV lights |
| most common problem for cell culture | mycoplasma from the mouth (breath) |
| flow cabinets cannot be used for | pathogens since they flow outward |
| Lowry | one part detects tryptophan and tyrosine, other part detects peptide bonds |
| Bradford | coomassie brilliant blue color change proportional to the concentration of protein |
| Folin-Ciocalteau | (Lowry) detects trp/tyr by phosphomolybdate salts by reacting with them |
| Biuret reaction | (Lowry) turns purple when copper sulfate reacts with peptide bonds |