Water, pH and Macromolecules Which of the following acid/base pairs act as natural buffers in living systems? H2CO3/HCO3- Histidine+/histidine All of these H2PO4-/HPO42- H2CO3/HCO3- Histidine+/histidine All of these H2PO4-/HPO42- ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Which of the following character does not apply to water? The covalent bonds in water are highly polarized All three atoms in the water molecule readily form hydrogen bonds The water molecule readily forms hydrophobic interactions The water molecule is asymmetric The covalent bonds in water are highly polarized All three atoms in the water molecule readily form hydrogen bonds The water molecule readily forms hydrophobic interactions The water molecule is asymmetric ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Weak acids generally have pKa that cannot be used to buffer been seldom found in living systems pKa values greater than 2 values less than 1 that cannot be used to buffer been seldom found in living systems pKa values greater than 2 values less than 1 ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Which of the following organic groups are found in naturally occuring amino acids? Indole Guanidinium ion All of these Imidazole Indole Guanidinium ion All of these Imidazole 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? 7 5 x 10-7 7 x 10-7 1 x 10-7 7 5 x 10-7 7 x 10-7 1 x 10-7 ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Buffer solutions tend to maintain a relatively constant pH. will always have a pH of 7 cause a decrease in pH when acids are added to them. are rarely found in living systems tend to maintain a relatively constant pH. will always have a pH of 7 cause a decrease in pH when acids are added to them. are rarely found in living systems ANSWER DOWNLOAD EXAMIANS APP
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