The Cell Membrane

What is the cell membrane made of?

• Carbohydrates and Lipids only
• Lipids only
• Lipids, Proteins, and Carbohydrates
• Lipids and Proteins only

What best describes the head end of a phospholipid?

• Hydrophilic
• Hydrophobic
• Nonpolar
• Amphipathic

What term best describes the tail end of a phospholipid?

• Amphipathic
• Hydrophobic
• Polar
• Hydrophilic

Which of the following are structural components of the cell membrane?

• Carbohydrates
• Proteins
• Nucleic Acids
• Lipids

Which of the following is true of the structures labeled A in the Cell Membrane?

• They are membrane proteins
• They are phospholipids
• They are carbohydrates
• They are entirely hydrophobic

What property makes phospholipids ideal building blocks for a cell membrane?

• They have hydrophilic heads and hydrophobic tails
• They have hydrophobic heads and tails
• They have hydrophilic heads and tails
• They have hydrophobic heads and hydrophilic tails

In the phospholipid bilayer, which region is hydrophilic?

• Both A and B
• A Only
• Neither A or B
• B Only

Part A of the cell membrane is composed of which of the following?

• Both the heads and the tails of the phospholipid molecules, arranged randomly
• Proteins attached to the heads of the phospholipid molecules
• The hydrophilic heads of the phospholipid molecules
• The hydrophobic tails of the phospholipid molecules

What best describes region B in the pictured phospholipid bilayer

• Nonpolar
• Hydrophobic
• Amphipathic
• Hydrophilic

Which of the following is true of the structures labeled D in the Cell Membrane?

• They are membrane proteins
• They are hydrophilic
• They are carbohydrates
• They are hydrophobic