What is a channel protein?
Bio: Cell Transport Practice Test

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•
Biology
•
9th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A type of protein that allows specific molecules to pass through the cell membrane, facilitating transport across the membrane.
2.
FLASHCARD QUESTION
Front
What is osmosis?
Back
The movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.
3.
FLASHCARD QUESTION
Front
Define diffusion.
Back
The movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.
4.
FLASHCARD QUESTION
Front
What is passive transport?
Back
The movement of substances across a cell membrane without the use of energy, relying on concentration gradients.
5.
FLASHCARD QUESTION
Front
What happens to a plant cell in salt water?
Back
It shrivels because water diffuses out of the cell due to the higher concentration of solutes in the salt water.
6.
FLASHCARD QUESTION
Front
What is exocytosis?
Back
The process by which a cell expels materials in vesicles that fuse with the cell membrane, releasing their contents outside the cell.
7.
FLASHCARD QUESTION
Front
What is facilitated diffusion?
Back
A type of passive transport that uses channel or carrier proteins to help move molecules across the cell membrane.
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