Multiple Choice
In which situation would passive transport not use a transport protein for entry into a cell?
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6. The Membrane
Passive vs. Active Transport
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Why is no energy required in passive transport?
A
Because it involves the active pumping of ions across the membrane.
B
Because it requires the use of transport proteins that consume energy.
C
Because it relies on the concentration gradient to move substances across the membrane.
D
Because it uses ATP to move substances against the concentration gradient.
Verified step by step guidance1
Understand the concept of passive transport: Passive transport is a type of cellular transport where substances move across cell membranes without the need for energy input from the cell.
Recognize the role of concentration gradients: In passive transport, substances move from an area of higher concentration to an area of lower concentration, following the natural concentration gradient.
Identify the types of passive transport: Common types include diffusion, osmosis, and facilitated diffusion, all of which rely on concentration gradients rather than energy consumption.
Differentiate from active transport: Unlike passive transport, active transport requires energy, often in the form of ATP, to move substances against their concentration gradient.
Conclude why no energy is required: Since passive transport utilizes the natural movement of molecules down their concentration gradient, it does not require additional energy input from the cell.
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