Multiple Choice
Which of the following is the correct number of major classes of biomolecules found in living organisms?
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4. Biomolecules
Introduction to Biomolecules
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Macromolecules, the molecules of life, include all of the following except __________.
A
lipids
B
proteins
C
nucleic acids
D
minerals
Verified step by step guidance1
Understand the definition of macromolecules: Macromolecules are large, complex molecules that are essential for life. They include carbohydrates, lipids, proteins, and nucleic acids, all of which are organic molecules made up of smaller subunits.
Review the four main types of macromolecules: 1) Carbohydrates (e.g., sugars and starches), 2) Lipids (e.g., fats and oils), 3) Proteins (e.g., enzymes and structural proteins), and 4) Nucleic acids (e.g., DNA and RNA).
Recognize that minerals are inorganic substances: Unlike macromolecules, minerals are not organic and do not consist of carbon-based subunits. They are simple inorganic compounds or elements (e.g., calcium, iron, potassium) that play a role in various biological processes but are not considered macromolecules.
Compare the options provided: Lipids, proteins, and nucleic acids are all macromolecules, while minerals are not. This distinction is based on their chemical composition and biological roles.
Conclude that the correct answer is 'minerals' because they do not fit the definition of macromolecules, unlike the other options listed.
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