Multiple Choice
Which part of the ear contains the cochlea?
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1. Introduction to Biology
Introduction to Biology
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Which of the following best describes the function of the plasma membrane in eukaryotic cells?
A
It produces ATP through cellular respiration.
B
It synthesizes proteins for the cell.
C
It regulates the movement of substances into and out of the cell.
D
It stores genetic information.
Verified step by step guidance1
Understand the role of the plasma membrane: The plasma membrane is a selectively permeable barrier that surrounds the cell, controlling the movement of substances in and out of the cell.
Eliminate incorrect options: The plasma membrane does not produce ATP (this is the role of mitochondria), synthesize proteins (this is the role of ribosomes), or store genetic information (this is the role of the nucleus).
Focus on the correct function: The plasma membrane is primarily responsible for regulating the exchange of materials such as nutrients, waste products, and ions between the cell and its environment.
Relate to the structure: The plasma membrane is composed of a phospholipid bilayer with embedded proteins, which facilitate selective transport and communication.
Conclude: The best description of the plasma membrane's function is that it regulates the movement of substances into and out of the cell.
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