Water, pH and Macromolecules
Which of the following indicates that the pK of an acid is numerically equal to the pH of the solution when the molar concentration of the acid and its conjugate base are equal?

Haldanes equation
Michaelis-Menten equation
Hardy-Windberg law
Henderson-Hasselbalch equation

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Water, pH and Macromolecules
Buffer solutions

are rarely found in living systems
cause a decrease in pH when acids are added to them.
will always have a pH of 7
tend to maintain a relatively constant pH.

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Water, pH and Macromolecules
Which of the following statements about covalently bonded molecules is false?

Such molecules often result from the interaction of ionized atoms
Noncovalent bonds may also be present, especially if the molecule is large
Electrons are shared between the atoms that make up the molecule
The chemical bonds that hold the molecule together are relatively strong

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