Multiple Choice
In proteins, what is the monomeric subunit that polymerizes to form a polypeptide chain?
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1. Introduction to Biochemistry
Proteins
Multiple Choice
Which of the following is a function of a protein macromolecule in cells?
A
Storing genetic information as the primary hereditary material
B
Catalyzing biochemical reactions as enzymes
C
Providing long-term energy storage primarily as triacylglycerols
D
Forming the core structural component of cellular membranes as phospholipid bilayers
Verified step by step guidance1
Identify the main functions of protein macromolecules in cells. Proteins primarily act as enzymes, structural components, signaling molecules, and transporters.
Recall that storing genetic information is the role of nucleic acids (DNA and RNA), not proteins.
Understand that long-term energy storage is mainly performed by lipids, such as triacylglycerols, rather than proteins.
Recognize that the core structural component of cellular membranes is the phospholipid bilayer, which is made of lipids, not proteins.
Conclude that the correct function of proteins among the options is catalyzing biochemical reactions as enzymes, since enzymes are proteins that speed up chemical reactions in cells.
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