Podcast
Questions and Answers
What is the structure of the cell membrane according to the fluid-mosaic model?
What is the structure of the cell membrane according to the fluid-mosaic model?
- Double layer of phospholipid molecules
- Single layer of phospholipid molecules
- Phospholipid bilayer interspersed with proteins and other substances (correct)
- Protein layer with interspersed phospholipids
What do the hydrophilic heads of the phospholipid molecules in the cell membrane point outward towards?
What do the hydrophilic heads of the phospholipid molecules in the cell membrane point outward towards?
- Water on each side (correct)
- Lipid-soluble substances
- The centre of the membrane
- Hydrophobic tails
What is the function of the phospholipid bilayer in the cell membrane?
What is the function of the phospholipid bilayer in the cell membrane?
- Allows lipid-soluble substances to enter and leave (correct)
- Forms a barrier against all substances
- Facilitates the movement of water-soluble substances
- Prevents water-soluble substances from entering and leaving
What is the main process through which water moves across a cell membrane?
What is the main process through which water moves across a cell membrane?
Which process requires energy to move substances across the cell membrane against their concentration gradient?
Which process requires energy to move substances across the cell membrane against their concentration gradient?
What is the structure of the cell membrane according to the fluid-mosaic model?
What is the structure of the cell membrane according to the fluid-mosaic model?
What is the primary function of the phospholipid bilayer in the cell membrane?
What is the primary function of the phospholipid bilayer in the cell membrane?
Which process involves the movement of water across a selectively permeable membrane?
Which process involves the movement of water across a selectively permeable membrane?
What distinguishes facilitated diffusion from simple diffusion?
What distinguishes facilitated diffusion from simple diffusion?
Which statement best describes the function of active transport in the cell membrane?
Which statement best describes the function of active transport in the cell membrane?
Flashcards are hidden until you start studying
