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You have a solution that is a mixture of two compounds, A and B. The molar extiniction coefficient of substance A at 260 nm and 280 nm is 5248 and 3150 respectively. Compound B has a molar extinction coefficent of 311 and 250 at 260 nm and 280 nm respectively. you determine that the solution has an absorbance of 0.83 and 260 nm and 0.67 at 280 nm. Can the individual concentrations of A and B be calculated from these data? If so wat are the concentrations of each compound in the solution?
The endosymbiont theory suggests that mitochondria and chloroplasts evolved from ancient bacteria that were ingested by primitive nucleated cells.
Would you describe your study area as an area of high or low biodiversity?
Your friend is trying to generate an in vitro system for studying the formation of COPII vesicles. He finds that to get well-organized vesicle budding from artificial membranes, he needs to add the coat proteins, the Sar1 GTP-binding protein.
find out in the way that RAS activity responds to extra-cellular signals? Why.
E. coli chromosomes in which every nitrogen atom is labeled (that is, every nitrogen atom is the heavy isotope 15N instead of the normal isotope 14N) are allowed to replicate in an environment in which all the nitrogen is 14N. Using a solid line t..
Discuss what biodiversity means and how it has been affected by natural and man-made pathways.
Determine which well-known goat feeding strategy combined with which errors in the design and execution of digestion trials led some animal nutritionists to believe that goats
bioinformatic You have been given a gene sequence, which is in RAW file format. Perform the following tasks by visually inspecting the sequence using information you were provided during lectures for Module 1, Topics 2 and 3.
Determine what position of the cardiac vector during the R wave gives identical signals in leads II and III? What does the ECG seen in lead I look like for this orientation of the vector?
Experiments with erythrocyte "ghosts" were carried out to learn more about the glucose transporter in red blood cells. "Ghosts" are prepared by lysing red blood cells in a hypotonic medium and washing away the cytoplasmic contents.
explain why the whole blood sample was stored in a solution that contains Ca2+ chelator.
Though plants, fungi, and prokaryotes all have cell walls, we classify them under different taxonomic units. Which of the observations below comes closest to explaining the basis for placing these organisms in different taxa.
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