Weak chemical bonds play important roles in the chemistry of life

Weak chemical bonds play important roles in the chemistry of life

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Weak chemical bonds play important roles in the chemistry of life. Within a cell, weak, brief bonds between molecules are important to a variety of processes. For example, signal molecules from one neuron use weak bonds to bind briefly to receptor  molecules on the surface of a receiving neuron. This triggers a response by the recipient. Weak interactions include ionic bonds (weak in water), hydrogen bonds, and van der Waals  interactions. Hydrogen bonds  form when a hydrogen atom already covalently bonded to a strongly  electronegative atom is attracted to another strongly electronegative atom. These strongly electronegative atoms are typically nitrogen or oxygen. These bonds form because a polar covalent bond leaves the hydrogen atom with a partial  positive charge and the other atom with a partial negative charge. The partially positive–charged hydrogen atom is attracted to regions of full or partial  negative charge on molecules, atoms, or even regions of the same large molecule. For example, ammonia molecules and water molecules interact with weak hydrogen bonds.
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Weak chemical bonds play important roles in the chemistry of life

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