PHYC452Biophysics:Schedule/quiz3
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Quiz 3 Topics
This quiz will cover the Beer-Lambert Law, absorbance measurements for protein and nucleic acid concentration measurements, and the laser classes for visible, CW lasers.
Students should know:
- The equation for the Beer-Lambert law
- The definition of absorbance and transmittance
- The units of molar extinction coefficient
- How to convert from a absorption cross section to molar extinction coefficient
- The wavelengths used for protein, vs nucleic acids.
- Absorbance at these wavelengths is primarly from ring structures
- The three amino acids that contribute most to protein absorbance
- The power ranges and safety considerations for visible, CW lasers for class I,II,IIa,IIIa,IIIb,IV lasers.
- See Laser Safety and consider only the old system (not revised).
Hey does any one know the answers to thee points. I don't know where to find them online.
- The wavelengths used for protein, vs nucleic acids.
- 280 for protein. 260 for Nucleic Acid
- Absorbance at these wavelengths is primarly from ring structures
- The three amino acids that contribute most to protein absorbance
- they have the ring structure and are phenylalanine, tryptophan, and tyrosine.