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A titration curve. Titration of an amino acid 14.00 12.00 10.00 8.00 6.00 4.00 2.00 0.00 0.0 4.0 1.0 2.0 3.0 added NaOH (mol) 15. Refer to Exhibit 3B. Which points on the graph represent pK's? a. 1 and7 b. 2, 4 and 6 c. 3 and 5 d. 2, 3, 4, 5 and 6 e. The pKs cannot be determined without more information. 16. Refer to Exhibit 3B. At which point would the amino acid have its maximum negative charge? a. b. 2 c. 4 d. 6 e. LUmposed primarily of p-sheet Exhibit 4HB 19. Refer to Exhibit 4B. The type of bonding labeled "L" in these figure is: a. Hydrogen bonding of the peptide backbone b. Hydrogen bonding involving the R-groups c. Hydrophobic interactions d. Metal ion coordination e. Electrostatic attraction (salt bridge) 20. Refer to Exhibit 4B. Which one shows covalent bonding of R-groups? a. K b. L с.О d. K and L e. All of these are true Exhibit 10A the following diagrams showing a replication fork moving from let template/parental strands. The 5 and 3 represent the ends of those template/parenia 3" 3 t 10A. Which diagram correctly depicts the orientation of the lagging and leading strands on the parentals? a. The top b. The bottom c. Neither is fully accurate. d. Either would be accurate dependent on the organism being studied. 56. Refer to Eshitbit 2A. Which of the fuio as a hydrogen donor to water eroupe cannot function e. All can donate a hydrogen to water

Answer 1

15) Answer is b. Pk's value is equal to the pH at half of the steeping point in curve.

16) Answer is e. At high NaOH concentration all acidic protons are abstracted and hence most negative charge is present in that state.

19) Answer is e. It is electrostatic interactions between positive NH3+ group and negative COO- group.

20) Answer is a.