| 21. | Field lines begin on positive charge and terminate on negative charge.
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| 22. | When embryonic cells are covered with hCG, they acquire a strong negative charge.
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| 23. | Ingested fat, when broken down into fatty acid molecules, has a negative charge.
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| 24. | When the sinoatrial cells are resting, they have a negative charge on their membranes.
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| 25. | This overexpression of sialic acid on surfaces creates a negative charge on cell membranes.
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| 26. | :The strongest bases typically bear negative charge and lone pairs on the same atom.
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| 27. | Most thunderstorms have positive charges near the top and negative charges at the bottom.
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| 28. | Organic materials in soil increase the CEC through an increase in available negative charges.
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| 29. | :Electrons that we observe have positive mass and negative charge.
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| 30. | Repulsion between the negative charges would raise the energy value near the transition state.
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