Which Of The Following Statements About Dehydration Reactions Is False?

Understand the synthesis of macromolecules Explain dehydration (or condensation) and hydrolysis reactions

As you’ve learned, nadechworld.comlogical macromolecules are large molecules, necessary for life, that are built from smaller organic molecules. There are four major classes of nadechworld.comlogical macromolecules (carbohydrates, lipids, proteins, and nucleic acids); each is an important cell component and performs a wide array of functions. Combined, these molecules make up the majority of a cell’s dry mass (recall that water makes up the majority of its complete mass). nadechworld.comlogical macromolecules are organic, meaning they contain carbon. In addition, they may contain hydrogen, oxygen, nitrogen, and additional minor elements.

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Dehydration Synthesis

Most macromolecules are made from single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers. In doing so, monomers release water molecules as byproducts. This type of reaction is known as dehydration synthesis, which means “to put together while losing water.”

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Polymers are broken down into monomers in a process known as hydrolysis, which means “to split water,” a reaction in which a water molecule is used during the breakdown (Figure (PageIndex{2})). During these reactions, the polymer is broken into two components: one part gains a hydrogen atom (H+) and the other gains a hydroxyl molecule (OH–) from a split water molecule.

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Shown is the breakdown of maltose to form two glucose monomers. Water is a reactant.

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