Which is true about the phospholipid bilayer of the cell membrane?
Phospholipids have a non-polar and polar ends
Phospolipids bilayer consists of two layers
Polar molecules have an unequal sharing of electrons
Non-Polar molecules have a equal sharing of electrons
All of the above are true
All of the above are true.
Match the description with the type of transport
4 points
Passive Active
Molecules move up the concentration gradient
Requires no energy
Requires energy
Molecules move with the flow
Molecules move up the concentration gradient
Requires no energy
Requires energy
Molecules move with the flow
Passive:
- Molecules move with the flow
- Requires no energy
Active:
- Molecules move up the concentration gradient
- Requires energy
Which of the below does not need a protein channel to cross the cell membrane?
0 points
Large molecules like glucose
Polar molecules
Water
All of the above require a protein channel
Water does not need a protein channel to cross the cell membrane.
What is the energy called that cells produce to power some of the protein channels?
1 point
Glucose
ATP
ADP
Phosphates