Cell membrane Flashcards
(16 cards)
What is the main structure of the cell membrane?
The cell membrane is primarily composed of a phospholipid bilayer.
True or False: The fluid mosaic model describes the cell membrane as a rigid structure.
False
Fill in the blank: The fluid mosaic model suggests that proteins are __________ within the phospholipid bilayer.
embedded
What is the role of cholesterol in the cell membrane?
Cholesterol helps to stabilize the fluidity/increase rigidity of the cell membrane.
Multiple Choice: Which of the following is NOT a component of the fluid mosaic model? A) Phospholipids B) Proteins C) Cellulose D) Cholesterol
C) Cellulose
What property of the cell membrane allows it to self-heal?
Fluidity
Short Answer: Name one type of protein found in the cell membrane.
Integral protein or peripheral protein.
True or False: The fluid mosaic model emphasizes the dynamic nature of the cell membrane.
True
What do glycoproteins in the cell membrane do?
Glycoproteins are involved in cell recognition and signaling.
Fill in the blank: The cell membrane is selectively __________, allowing certain substances to pass while blocking others.
permeable
Multiple Choice: Which of the following best describes the arrangement of phospholipids in the cell membrane? A) Single layer B) Bilayer C) Triple layer D) None of the above
B) Bilayer
What is the function of membrane proteins?
Membrane proteins facilitate communication, transport, and enzymatic activities.
Short Answer: What term describes the movement of lipids and proteins within the membrane?
Lateral diffusion.
Fill in the blank: The __________ head of phospholipids is hydrophilic, while the tails are hydrophobic.
phosphate-linked
Which are the functions of the cell membrane?
Permeable barrier and metabolic
Which are the three characteristics of the cell membrane, resulting from the fluid mosaic model?
Fluidity, Heterogeneity, Asymmetry
