Water, pH and Macromolecules Which of the following acid/base pairs act as natural buffers in living systems? H2PO4-/HPO42- Histidine+/histidine All of these H2CO3/HCO3- H2PO4-/HPO42- Histidine+/histidine All of these H2CO3/HCO3- ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules What is the concentration, in moles/liter, of the hydrogen ion, if pH of a solution is 7? 1 x 10-7 5 x 10-7 7 x 10-7 7 1 x 10-7 5 x 10-7 7 x 10-7 7 ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules The reactions of molecules are independent of the functional groups All of these are the reactions of the functional groups require an enzyme in all cases are independent of the functional groups All of these are the reactions of the functional groups require an enzyme in all cases ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Buffer solutions are rarely found in living systems tend to maintain a relatively constant pH. cause a decrease in pH when acids are added to them. will always have a pH of 7 are rarely found in living systems tend to maintain a relatively constant pH. cause a decrease in pH when acids are added to them. will always have a pH of 7 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 if their concentration is kept low at pH values around neutrality at pH values around any of their pKa's only in combination with polyprotic bases if their concentration is kept low at pH values around neutrality at pH values around any of their pKa's ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Which of the following organic groups are found in naturally occuring amino acids? Guanidinium ion Imidazole Indole All of these Guanidinium ion Imidazole Indole All of these ANSWER DOWNLOAD EXAMIANS APP
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