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Water, pH and Macromolecules

Water, pH and Macromolecules
A Bronsted acid becomes __________ upon losing a proton.

a hydronium ion
its conjugate acid
highly reactive
its conjugate base

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Water, pH and Macromolecules
Which of the following organic groups are found in naturally occuring amino acids?

All of these
Imidazole
Indole
Guanidinium ion

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Water, pH and Macromolecules
Who discovered and described the blood groups (ABO) classification?

Karl Landsteiner
Otto Warburg
Theodor Kocher
Karl Hooper

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Water, pH and Macromolecules
Which of the following acid/base pairs act as natural buffers in living systems?

H2CO3/HCO3-
All of these
H2PO4-/HPO42-
Histidine+/histidine

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Water, pH and Macromolecules
A solution with pH = 5 is __________ than a solution with pH = 7.

2 times more basic
10 times more basic
10 times more acidic
100 times more acidic

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Water, pH and Macromolecules
The pH of a solution is determined by

environmental effect
dielectric constant of the medium
concentration of salt
relative concentration of acids and bases

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