Asprin (acetylsalicyclic acid) has a pKa of 3.4. What is the ratio of [A-] to [HA] at pH of 7.4 (the pH of blood)? 104 None of the listed possible answers are correct. 104 4 4 Which of the following would be the most ionized (under standard physiological conditions)? lactic acid, (pKa=3.9) phosphoric acid (pKa=2.1) acetic acid (pKa=4.7) phenol (pKa=9.9) Hydrogen-bonding is an attractive force between all of the following EXCEPT R-groups of Phe and Val Polysaccharides in water DNA double strands Protein components to make secondary structure R-groups of Ser and Trp