Multiple Choice
Which of the following is a function of proteins in living organisms?
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1. Introduction to Biochemistry
Proteins
Multiple Choice
Which of the following is a function of protein macromolecules in cells?
A
Catalyzing biochemical reactions by acting as enzymes
B
Forming the hydrophobic core of biological membranes as the primary structural component
C
Storing genetic information as the primary hereditary material
D
Serving as the main long-term energy storage molecules in animals
Verified step by step guidance1
Understand the primary functions of protein macromolecules in cells. Proteins are versatile molecules that perform a wide range of functions including catalysis, structural support, transport, signaling, and more.
Recall that enzymes are proteins that catalyze biochemical reactions, meaning they speed up chemical reactions without being consumed in the process. This is a key functional role of proteins.
Consider the other options: the hydrophobic core of biological membranes is primarily formed by lipids, not proteins. Lipids create the bilayer structure essential for membrane integrity.
Recognize that storing genetic information is the role of nucleic acids (DNA and RNA), not proteins. DNA holds hereditary information, while RNA plays roles in gene expression.
Note that long-term energy storage in animals is mainly accomplished by lipids (such as triglycerides), not proteins. Proteins are generally not used for energy storage.
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