A mixture of the following proteins was added to a positively charged ion exchange chromatography column at pH 7.  After adding the proteins, the column was rinsed with a gradually increasing concentration of NaCl until all proteins were removed. Given the isoelectric points (pI) values below, what is the order of removal (elution) of proteins, from first to last?    Ribonuclease (pI = 9.0) Aconitase (pI = 7.0) Hemoglobin (pI = 6.0) Albumin (pI = 4.1)

E. coli cells were grown at different temperatures.  At which temperature (OC) do the cells produce membranes with the highest ratio of saturated/unsaturated fatty acids?

Which of the following methods could be used to determine the sequence of a protein?

Consider the following reaction at equilibrium.  What effect will increasing the temperature have on the system?                   Fe3O4(s) + CO(g) ⇌  3 FeO(s) + CO2(g)                     ∆{“version”:”1.1″,”math”:”∆”} H°=  +35.9 kJ

Peerwise question with minor edits by Dr. Butcher. Which of the following answer choices regarding hemoglobin and myoglobin is FALSE?

Is the activation energy for a forward reaction the same as the activation energy for the reverse of the same reaction?  Use a sketch of a reaction energy diagram.  

List and describe three differences between active and passive continental margins. 

Determine the rate law and the value of k for the following reaction using the data provided.         S2O82⁻(aq) + 3 I⁻(aq)  →  2 SO42⁻(g) + I3⁻(aq)               [S2O82⁻]M)[I⁻]i (M)Initial Rate(M-1s-1) 0.30                   0.42         4.54 0.44                   0.42         6.65 0.44                   0.21         3.33  

Given the following balanced equation, determine the rate of reaction with respect to                     [NH3].N2(g) + 3 H2(g)  →  2 NH3(g)

What are the units of k in the following rate law?                 Rate = k[X]2