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TLS Online TPP Program

#Question id: 18853

Your purification strategy of combinations of chromatography steps gives a protein preparation with a single band on SDS-PAGE. Which of the following would be best for determining the protein concentration (as mg/ml or molarity)?

#Unit 13. Methods in Biology
  1. Measure a UV absorbance scan and use the absorbance at 280nm with the molar extinction coefficient (predicted from the amino acid sequence)
  2. Determine amino acid composition after hydrolysis to amino acids
  3. Colorimetric assay using Bradford or BCA assays
  4. "Guesstimate" the concentration from the intensity of bands on SDS-PAGE gel
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TLS Online TPP Program

#Question id: 5707

#Unit 8. Inheritance Biology

Which of the following statement is correct for human is heterozygous for inversion?
TLS Online TPP Program

#Question id: 33707

#Unit 2. Cellular Organization

The overall consensus sequence of the present satellite in human is 
TLS Online TPP Program

#Question id: 23871

#Unit 13. Methods in Biology

Gene therapy
TLS Online TPP Program

#Question id: 18079

#Unit 9. Diversity of Life Forms

Within a gymnosperm megasporangium, what is the correct sequence in which the following should appear during development, assuming that fertilization occurs? 
1. Sporophyte embryo 2. female gametophyte 
3. egg cell                 4. megaspore 
TLS Online TPP Program

#Question id: 8963

#Unit 9. Diversity of Life Forms

What kind of data should probably have the greatest impact on animal taxonomy in the coming decades?