Most of the living individuals encompassed with water and organic molecules. These organic molecules are mostly occupied by carbon and hydrogen because these carbon atoms form four covalent bonds with hydrogen atoms. Other compounds that are also essential to life are oxygen, nitrogen, phosphorus, and sulfur. All living individuals have four types of organic macromolecules, namely proteins, nucleic acids , carbohydrates, and lipids. These macromolecules are made up of smaller subunits called monomer. Monomers are joined with each other, like a train, through covalent bonds to form large molecules called polymers . In living organisms, there are two important reactions, such as hydration and dehydration synthesis. These chemical reactions are essential to life.

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Chapter 2, Problem 8MCQ

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Most of the living individuals encompassed with water and organic molecules. These organic molecules are mostly occupied by carbon and hydrogen because these carbon atoms form four covalent bonds with hydrogen atoms. Other compounds that are also essential to life are oxygen, nitrogen, phosphorus, and sulfur.

All living individuals have four types of organic macromolecules, namely proteins, nucleic acids, carbohydrates, and lipids. These macromolecules are made up of smaller subunits called monomer. Monomers are joined with each other, like a train, through covalent bonds to form large molecules called polymers.

In living organisms, there are two important reactions, such as hydration and dehydration synthesis. These chemical reactions are essential to life.

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