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Water, pH and Macromolecules

Water, pH and Macromolecules
The dissociation constant of H2O at 25° C is

1014 M
10-7 M
107 M
10-14 M

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Water, pH and Macromolecules
H2O and CH4 are both examples of

ions
acids
none of these
molecules

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Water, pH and Macromolecules
The elements oxygen, nitrogen, and carbon

can all form covalent bonds with other elements
are common elements in the molecules that make up living organisms
All of these
contain protons and neutrons in their atomic nuclei

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

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

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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
both (a) and (b)
molar concentration of the buffer components
temperature of buffer components

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

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

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MORE MCQ ON Water, pH and Macromolecules

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