11 Questions
What type of proteins bind to molecules and change shape to shuttle them across the membrane?
Carrier proteins
What force decides the direction of transport based on the concentration of what is being moved?
Chemical force
What type of transport requires the hydrolysis of ATP (or GTP) to move substances?
Pumps
What is the difference in electric charge between the inside and outside of the cell called?
Membrane potential
How can membrane potential be measured?
With tiny glass electrodes
What property of the plasma membrane allows cells to control the concentration of ions in and out side of the cell?
Permeability
What type of molecules cross the membrane easily due to their ability to dissolve in the lipid bilayer?
Hydrophobic molecules
In which type of transport do molecules move from low concentration to high concentration using energy from ATP hydrolysis?
Primary active transport
What is the ability of a solution to cause a cell to gain or lose water called?
Osmosis
Which type of transport protein speeds the passive movement of molecules across the membrane down the gradient?
Channel proteins
What type of transport requires the expenditure of energy and usually provides it through the hydrolysis of ATP?
Active transport
Test your knowledge about membrane proteins, lipid synthesis in the endoplasmic reticulum and golgi apparatus, and the concept of selective permeability of the lipid bilayer in cells.
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