Question:
For facilitated diffusion in plant________ is essential.
For facilitated diffusion in plant________ is essential.
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Facilitated diffusion is a passive process, so it needs a gradient but no metabolic energy.
Updated On: Nov 13, 2026
expenditure of energy
concentration gradient
atmospheric pressure
root pressure
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
Facilitated diffusion moves substances across a membrane through carrier or channel proteins without using ATP.
Step 2: What it needs
Movement takes place only down a concentration gradient, so a concentration gradient is essential.
Step 3: Compare the options
Expenditure of energy is needed for active transport, not for facilitated diffusion.
Final Answer:
A concentration gradient is essential for facilitated diffusion. \[ \boxed{\text{(B) }\text{concentration gradient}} \]
Facilitated diffusion moves substances across a membrane through carrier or channel proteins without using ATP.
Step 2: What it needs
Movement takes place only down a concentration gradient, so a concentration gradient is essential.
Step 3: Compare the options
Expenditure of energy is needed for active transport, not for facilitated diffusion.
Final Answer:
A concentration gradient is essential for facilitated diffusion. \[ \boxed{\text{(B) }\text{concentration gradient}} \]
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