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Water, pH and Macromolecules

Water, pH and Macromolecules
Which of the following will easily dissolve in a polar solvent?

argon
methane
sodium chloride
gasoline (heptanes & octanes)

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

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

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Water, pH and Macromolecules
Which of the following alcohols would be most soluble in water?

methanol
octanol
ethanol
butanol

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Water, pH and Macromolecules
Molecules in which the atoms are held together by __________ bonds have the strongest chemical linkages.

ionic
covalent
noncovalent
hydrogen

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

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

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

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

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