Multiple Choice
Which biological macromolecule is composed of monomers such as the one shown below (a nucleotide with a phosphate group, a pentose sugar, and a nitrogenous base)?
86
views
4. Biomolecules
Introduction to Biomolecules
Multiple Choice
Which of the following is NOT considered a macromolecule found in living organisms?
A
Nucleic acids
B
Lipids
C
Proteins
D
Vitamins
Verified step by step guidance1
Understand the definition of macromolecules: Macromolecules are large, complex molecules that are essential for life. They include nucleic acids, lipids, proteins, and carbohydrates, which are all polymers or large molecules made up of smaller subunits.
Analyze the options provided: Nucleic acids (e.g., DNA and RNA) are macromolecules responsible for storing and transmitting genetic information. Lipids (e.g., fats and oils) are macromolecules that play roles in energy storage and cell membrane structure. Proteins are macromolecules made of amino acids that perform a wide range of functions, including enzymatic and structural roles.
Consider the nature of vitamins: Vitamins are organic compounds required in small amounts for various biochemical functions, but they are not polymers or large molecules. They are not classified as macromolecules because they are relatively small in size and do not form long chains or complex structures like the other options.
Compare vitamins to macromolecules: While macromolecules are typically large and made of repeating subunits, vitamins are small, individual molecules that act as cofactors or coenzymes in metabolic processes.
Conclude that vitamins are NOT considered macromolecules: Based on the definitions and characteristics, vitamins do not fit the criteria for macromolecules, making them the correct answer to the question.
Related Videos
Related Practice
