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Water, pH and Macromolecules

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

Theodor Kocher
Karl Landsteiner
Karl Hooper
Otto Warburg

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Water, pH and Macromolecules
If protein is made exclusively from nonpolar amino acids, then it will this protein interact with water?

It will form a membrane in water
It will be attracted to water
be repelled by water
It will act as a buffer and stabilize the pH

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Water, pH and Macromolecules
The effectiveness or capacity of a buffer solution can be affected by

concentration of the conjugate base to the weak acid
temperature of buffer components
molar concentration of the buffer components
both (a) and (b)

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

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

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Water, pH and Macromolecules
Most of the important functional groups in biological molecules contain

oxygen and a phosphate
nitrogen and a phosphate
oxygen and/or nitrogen and are acidic
oxygen and/or nitrogen and are polar

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

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

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