What is the plasma membrane?
Plasma Membrane Structure

Flashcard
•
Biology
•
9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The plasma membrane is a biological membrane that separates and protects the interior of all cells from the external environment.
2.
FLASHCARD QUESTION
Front
What are the main components of the plasma membrane?
Back
The main components of the plasma membrane are phospholipids, proteins, carbohydrates, and cholesterol.
3.
FLASHCARD QUESTION
Front
What is the function of phospholipids in the plasma membrane?
Back
Phospholipids form a bilayer that provides a barrier to most water-soluble substances, allowing selective permeability.
4.
FLASHCARD QUESTION
Front
What role do proteins play in the plasma membrane?
Back
Proteins in the plasma membrane assist in transport, act as receptors, and provide structural support.
5.
FLASHCARD QUESTION
Front
What is the difference between peripheral and integral proteins?
Back
Peripheral proteins are attached to the surface of the membrane, while integral proteins are embedded within the membrane.
6.
FLASHCARD QUESTION
Front
What is the function of cholesterol in the plasma membrane?
Back
Cholesterol helps to stabilize the fluidity of the plasma membrane, making it less permeable to very small water-soluble molecules.
7.
FLASHCARD QUESTION
Front
What are channel proteins?
Back
Channel proteins are integral proteins that allow specific molecules or ions to pass through the membrane without using energy.
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