What are the two main functions of proteins in the cell membrane?
AP Biology Unit 2

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Biology
•
10th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
1.) Act as gatekeepers, allowing only certain substances to enter. 2.) Serve as enzyme receptors embedded in the membrane.
2.
FLASHCARD QUESTION
Front
In which direction do particles naturally diffuse?
Back
Down the concentration gradient.
3.
FLASHCARD QUESTION
Front
What structures do plant cells use for cell-to-cell communication?
Back
Plasmodesmata.
4.
FLASHCARD QUESTION
Front
How does rinsing swollen gums with warm salt water help?
Back
Water in the gums will diffuse out of the cells.
5.
FLASHCARD QUESTION
Front
What component strengthens and stabilizes the cell membrane?
Back
Cholesterol.
6.
FLASHCARD QUESTION
Front
Define diffusion in biological terms.
Back
The movement of particles from an area of higher concentration to an area of lower concentration.
7.
FLASHCARD QUESTION
Front
What is the role of carbohydrates in the cell membrane?
Back
They serve as recognition sites for cell signaling and communication.
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