Uncategorized

Evolutionary Biology in the age of Genomics- Q1. Phylogenetic trees- You are analyzing sequences sampled from four turtle species (A-D), considering a genomic region that is 75 base pairs long. You observe the following table of the number of substitutions between pairs of species:   A B C D A […]

Drug X is used to suppress the secretion of CRH. Two patients with hypersecretion of cortisol are given Drug X. Patient A’s cortisol secretion level remains elevated, but patient B’s cortisol secretion level falls to normal levels. 1. Determine which patient has primary hypercortisolism (if any) and which has secondary […]

1. A very short physiology student is asked to measure the blood pressure of a very tall student. She decides to measure the blood pressure at the level of the tall student’s foot while he is standing (NOTE: she is not measuring blood pressure on his foot). After taking the […]

You are asked to run an SDS-PAGE analysis of samples from an affinity chromatography experiment performed by your TA. A recombinant protein with a hexahistidine tag was captured in a nickel- agarose bead matrix and eluted off the column with 75mM imidazole. Your TA was hoping to make about 2 […]