Answer Happy

Question 5 Both parallel and anti-parallel beta-sheets are stabilized by ideal, backbone H-bonds. TRUE FALSE Question 6 0.5 pts A molecule can be classified as a thiol (pKa = 8.7) and a secondary amine (pKaH = 11.2). What is the net charge on the molecule at pH = 4.3? 0 C OO -1 +2 +1 0.5 pts

0 Question 7 0.5 pts Consider a molecule with an imidazole ring as the only ionizable group. What is the pKa (or pKaH) of the molecule if it is 34% ionized at pH = 7.4? O 7.7 5.5 9.3 7.1 Question 8 0.5 pts If in a protein, the side chains of C and E can form a H-bond at pH = 7.3. O FALSE TRUE