Cell Structure and Function

Which part of the phospholipid is hydrophilic?

• Hydrocarbon tail
• Nonpolar region
• Fatty acid chain
• Polar head

The fluidity of the membrane is influenced by:

• Amount of carbohydrates
• Size of the cell
• Number of ribosomes
• Composition of lipids and presence of cholesterol

The model describing the current understanding of the plasma membrane is called:

• Sandwich model
• Unit membrane model
• Fluid mosaic model
• Static lattice model

How are membrane proteins classified based on extraction ease?

• Primary and secondary
• Soluble and insoluble
• Integral and peripheral
• Surface and deep

What percentage of protein is found in human erythrocyte membranes?

• 30%
• 40%
• 48%
• Approximately 52%