Cell Membrane/Transport Quiz Prep

The boundary that separates a cell from its external environment

• cell wall
• nucleus membrane
• cytoplasmic barrier
• cell membrane

What does "selectively permeable" mean?

• Allows all substances to pass through
• Allows only gases to pass through
• Allows some substances to pass through while blocking others
• Blocks all substances from passing through

The material that makes up the bulk of cell membranes.

• Nucleic acids
• Proteins
• Phospholipids
• Carbohydrates

The head of a phospholipid is ___________

• hydrophillic

• hydrophobic

The fatty acid tails of phospholipids are __________

• hydrophillic

• hydrophobic

Hydrophillic means____________

• having an aversion to water
• having an affinity for water

Hydrophobic means_________?

• Repelling water
• Attracting water

We say that a cell membrane is arranged in a ______________.

• nucleic acid layer
• carbohydrate trilayer
• protein monolayer
• phospholipid bilayer

Glycolipids are _______________

• nucleic acids with a lipid component
• carbohydrates without lipids
• lipids with a carbohydrate attached
• proteins with a lipid tail

Glycolipids provide ___________ to the membrane.

• flexibility
• stability
• rigidity
• permeability