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3. Which of the following molecules is useful in protein phosphorylation studies? a. α-32P ATP b. β-32P ATP c. γ-32P ATP d. ATP-γ-S γ-32P ATP is the correct answer for […]

2. During growth and division of E. coli, the daughter strand is recognized due to a. Hemimethylation of newly synthesized DNA b. Nicks in newly synthesized DNA c. double stranded […]

1. When antibiotic-sensitive bacteria are spread on a plate containing antibiotic, colonies of resistant bacteria grow. The best explanation for this is: a. the antibiotic is mutagenic b. the antibiotic […]

15. A molecular cage allows the nitrogen of ammonia to become sp2 hybridized (instead of the usual sp3 hybridization). What do you expect the structure of this ammonia molecule to […]

14. What is the correct order of acidity for these compounds? a. (a) < (b) b. (a) = (b) c. (a) > (b) d. It depends on the pH The […]

13. Two equilibria are shown below: The following is true for these equilibria: a. Both (a) and (b) have equal populations of the isomers b. Both (a) and (b) have […]

11. How many chiral carbons does the following structure have when n is even? a. all its carbons are chiral b. n c. n+1 d. n+2 The correct answer is […]

12. Element X crystallizes into an FCC lattice with cell edge of 200 pm. The density of the element is 5 g/cm3. 200 g of this element contain how many […]

10. The graph below gives an interaction potential between two atoms as a function of the distance between them. What sort of bonds do you expect the two atoms to […]

9. The three pK’s of the amino acid lysine are approximately 2.1, 9.2 and 10.8. Which of the following is true in an electrophoresis experiment: a. Lysine does not migrate […]