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PracticeExam1

In molecular sieving chromatography gel filtration

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19. In molecular sieving chromatography (gel filtration), the larger molecules: a. do not enter the gel beads. b. spend most of their time in the gel beads. c. come out last. d. remain stuck to the beads. e. none of the above. 20. To sequence a protein with quaternary structure stabilized by disulfide bonds, such as that found in the immunoglobins (blood antibodies) and insulin, one would first have to: 21. The dipeptide that has the most UV absorbance is: 22. The Edman reagent that reacts with polypeptides is: 23. Suppose you isolated an nonapeptide from biochemistry lab student’s blood. After getting it absolutely pure you acid hydrolyzed it to find 0.4 F moles each of R, E, H, M, S, T, C, Y, I. This indicates that the peptide contains only one: a. Glutamate. b. Tryptophan. c. Alanine. d. Thiamine. e. Glutamine. 24. Reaction of the peptide (question 23) with FDNB produced a DNP-product after acid hydrolysis containing an sulfhydryl R-group. This indicates that:
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