Phospholipid Bilayer Structure

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What property does the polar head of a phospholipid exhibit?

Hydrophobic

Loves water (correct)

Moves around freely

Forms nonpolar tails

Which part of a phospholipid is described as hydrophobic?

Fluid mosaic model

Cholesterol

Polar head

Nonpolar tails (correct)

What type of model is used to describe the movement of phospholipids in the cell membrane?

Cholesterol model

Fluid mosaic model (correct)

Static model

Bilayer model

What is the function of cholesterol in the cell membrane?

Critical for cell membrane structure Signup and view all the answers

Which molecule is known to cause problems when it builds up in arteries?

Cholesterol in cell membrane Signup and view all the answers

What defines the border of the whole cell in terms of the cell membrane?

Phospholipid bilayer Signup and view all the answers

What is the role of cholesterol in the cell membrane?

To prevent phospholipids from becoming too packed Signup and view all the answers

Which type of proteins tend to be on the exterior areas of the cell membrane?

Peripheral proteins Signup and view all the answers

Why are integral proteins important for cells?

To transport materials through the membrane Signup and view all the answers

What is the function of glycoproteins and glycolipids in cell recognition?

Identify the cell as belonging to an organism Signup and view all the answers

How does the HIV virus exploit a glycoprotein known as CD4?

To bind to Helper T cells and infect them Signup and view all the answers

Why can't glucose molecules easily enter cells through the phospholipid bilayer?

Because they are too big and polar Signup and view all the answers

Phospholipid Bilayer Structure

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Questions and Answers

What property does the polar head of a phospholipid exhibit?

Which part of a phospholipid is described as hydrophobic?

What type of model is used to describe the movement of phospholipids in the cell membrane?

What is the function of cholesterol in the cell membrane?

Which molecule is known to cause problems when it builds up in arteries?

What defines the border of the whole cell in terms of the cell membrane?

What is the role of cholesterol in the cell membrane?

Which type of proteins tend to be on the exterior areas of the cell membrane?

Why are integral proteins important for cells?

What is the function of glycoproteins and glycolipids in cell recognition?

How does the HIV virus exploit a glycoprotein known as CD4?

Why can't glucose molecules easily enter cells through the phospholipid bilayer?

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