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

nitrogen and a phosphate
oxygen 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 statements about covalently bonded molecules is false?

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

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