객관식
Aquifers are _______.
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1. Introduction to Biology
Introduction to Biology
객관식
Which of the following best describes the primary function of the plasma membrane in eukaryotic cells?
A
It synthesizes proteins for the cell.
B
It regulates the movement of substances into and out of the cell.
C
It produces ATP through cellular respiration.
D
It stores genetic information.
검증된 단계별 안내1
Understand the structure and composition of the plasma membrane: The plasma membrane is primarily composed of a phospholipid bilayer with embedded proteins, cholesterol, and carbohydrates. This structure is crucial for its function.
Recognize the primary function of the plasma membrane: The plasma membrane acts as a selective barrier, regulating the movement of substances into and out of the cell. This ensures the cell maintains homeostasis.
Eliminate incorrect options: Protein synthesis occurs in ribosomes, not the plasma membrane. ATP production is a function of mitochondria, and genetic information is stored in the nucleus, not the plasma membrane.
Focus on the correct option: The plasma membrane's selective permeability allows it to control the exchange of ions, nutrients, and waste products, which is essential for cell survival.
Relate the function to biological processes: The plasma membrane uses mechanisms like passive transport (diffusion, osmosis) and active transport (using energy) to regulate substance movement, ensuring the cell's internal environment remains stable.
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