Water, pH and Macromolecules Which of the following acid/base pairs act as natural buffers in living systems? H2PO4-/HPO42- H2CO3/HCO3- Histidine+/histidine All of these H2PO4-/HPO42- H2CO3/HCO3- Histidine+/histidine All of these ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Polyprotic acids such as H3PO4, can act as acid-base buffers only in combination with polyprotic bases at pH values around neutrality at pH values around any of their pKa's if their concentration is kept low only in combination with polyprotic bases at pH values around neutrality at pH values around any of their pKa's if their concentration is kept low ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Most of the important functional groups in biological molecules contain oxygen and a phosphate oxygen and/or nitrogen and are acidic oxygen and/or nitrogen and are polar nitrogen and a phosphate oxygen and a phosphate oxygen and/or nitrogen and are acidic oxygen and/or nitrogen and are polar nitrogen and a phosphate ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules A biological polymer contains alanine, tyrosine, and lysine. Which of the following will be true about this molecule? Protein Strong base DNA Phospholipid Protein Strong base DNA Phospholipid ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules A compound that is capable of forming hydrogen bonds with water should act as a good buffer for acids and bases does not dissolve well in water contains at least some polar covalent bonds is probably held together by noncovalent bonds should act as a good buffer for acids and bases does not dissolve well in water contains at least some polar covalent bonds is probably held together by noncovalent bonds ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Which of the following organic groups are found in naturally occuring amino acids? All of these Guanidinium ion Imidazole Indole All of these Guanidinium ion Imidazole Indole ANSWER DOWNLOAD EXAMIANS APP
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