3.3-3.5 Review

The fluid mosaic model has many components. Which acts as a marker for the cell and enables the cell to be identified?

• Carbohydrates

• Cholesterol

• Phospholipids

• Proteins

The fluid mosaic model has many components. Which is used to transport substances?

• Carbohydrates

• Cholesterol

• Phospholipids

• Proteins

The fluid mosaic model has many components. Which is used to space out phospholipids to strengthen the membrane by making it more fluid?

• Carbohydrates

• Cholesterol

• Phospholipids

• Proteins

The fluid mosaic model has many components. Which is the basis of the structure of the cell membrane?

• Carbohydrates

• Cholesterol

• Phospholipids

• Proteins

The _______ model is used to describe the cell membrane

• impermeable barrier

• rigid structure
• fluid mosaic
• lipid bilayer

What is the main structural component of the cell membrane?

• d) Cholesterol
• a) Proteins
• b) Carbohydrates
• c) Phospholipids

The fluid mosaic model of the cell membrane suggests that: a) The membrane is rigid and unchanging b) c) d)

• The membrane is rigid and unchanging

• The membrane is composed of a fixed number of molecules

• The membrane is a dynamic structure with various molecules that can move

• The membrane is composed of only lipids and proteins

Which of the following statements about phospholipids in the cell membrane is true?

• a) They are hydrophobic on both ends

• b) They have a hydrophilic head and two hydrophobic tails

• c) They are primarily composed of proteins

• d) They are completely impermeable to ions and small molecules

Cholesterol is an important component of the cell membrane because it:

• a) Increases membrane fluidity

• b) Acts as a structural protein

• c) Enhances the movement of ions across the membrane

• d) Is not found in the cell membrane

Which of the following molecules can easily pass through the lipid bilayer of the cell membrane without the need for transport proteins?

• a) Large proteins

• b) Charged Ions

• c) Water molecules

• d) Oxygen gas (O2)