Question 5 What type of molecule resides in the middle of an alpha helix? O Water 02 CO2 The R groups Nothing. Question 6 In cation exchange chromatography, the solid phase is: Negatively charged Positively charged Highly hydrophobic Completely saturated with salt An antibody 1 pts 1 pts Question 7 You are a scientist studying diabetes and you want to isolate a protein that binds to insulin. After a few purification steps, you decided to run your semi-pure protein sample through a column that has insulin attached to the solid phase. What type of chromatography is this? lon-exchange chromatography Dialysis Size-exclusion chromatography SDS-PAGE O Affinity chromatography Question 8 Which of the following will elute last in a gel filtration chromatography 1 pts Proteinase inhibitor (3.4 KD) Cytochrome C (11.6 KD) RNA polymerase (98.9 KD) LDH (140 KD) There is not enough information to answer this question 1 pts
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