Multiple Choice
Which of the following does not accurately describe a channel or a carrier?
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2. Cell Chemistry & Cell Components
Simple and Facilitated Diffusion
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Which of the following statements about diffusion is true?
A
It involves only the movement of water molecules.
B
It requires expenditure of energy by the cell.
C
It occurs when molecules move from a region of lower concentration to a region of higher concentration.
D
It always requires integral proteins of the cell membrane.
E
It is a passive process.
Verified step by step guidance1
Understand the concept of diffusion: Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration, driven by the concentration gradient.
Identify the nature of diffusion: Diffusion is a passive process, meaning it does not require energy expenditure by the cell.
Evaluate the options: Analyze each statement to determine if it aligns with the definition and characteristics of diffusion.
Option analysis: 'It involves only the movement of water molecules' is incorrect because diffusion can involve various types of molecules, not just water.
Option analysis: 'It requires expenditure of energy by the cell' is incorrect because diffusion is passive and does not require energy.
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