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Multiple Choice
Which of the following factors affects the rate of diffusion across a membrane?
A
Color of the molecules
B
Number of chromosomes
C
Phase of the moon
D
Temperature
Verified step by step guidance
1
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 factors that influence diffusion: The rate of diffusion is affected by factors such as temperature, molecular size, concentration gradient, and the properties of the membrane (e.g., permeability).
Analyze the options provided: 'Color of the molecules' and 'Number of chromosomes' are not scientifically relevant to diffusion. 'Phase of the moon' is unrelated to biological processes like diffusion.
Focus on temperature: Temperature directly affects the kinetic energy of molecules. Higher temperatures increase molecular movement, leading to a faster rate of diffusion, while lower temperatures slow it down.
Conclude that temperature is the correct factor: Based on the scientific principles of diffusion, temperature is the only option provided that directly impacts the rate of diffusion across a membrane.