Water channels are made up of how many different types of aquaporins?
Eight
Four
Five
Twenty
Related Questions
Which of the following is NOT a characteristic of facilitated diffusion?
It requires specific membrane proteins.
It does not require ATP.
It is a passive process.
It moves substances against their concentration gradient.
A mutation in an aquaporin gene results in a non-functional protein. Which of the following cellular processes would be MOST directly affected?
Glucose uptake by muscle cells
Sodium transport across nerve cell membranes
Water reabsorption in the kidneys
Calcium storage in the sarcoplasmic reticulum
If two molecules A & B move in the same direction. This movement can be called
Antiport
Symport
Uniport
Guttation
Facilitated diffusion is different from simple diffusion because it:
Moves molecules against the concentration gradient
Uses carrier proteins
Requires ATP
Occurs only in plant cells
Facilitated diffusion does not require/show
Special membrane proteins
Saturation of transport
ATP energy
Selective nature
Facilitated diffusion involves?
Downhill transport
Without expenditure of energy
Involvement of proteins
All
What are the aquaporins in facilitated diffusion process?
Membrane proteins
Carrier proteins
Channel proteins
Carrier lipids
Facilitated diffusion differs from simple diffusion in that it:
Requires ATP
Moves substances against their concentration gradient
Requires membrane proteins
Occurs only in plant cells
Which of the following statements regarding facilitated diffusion is INCORRECT?
It requires transport proteins.
It is a passive process and does not require energy.
It can move molecules against their concentration gradient.
Transport proteins involved can become saturated.
Some statements are given regarding the active transport in plants. Choose the incorrect statement
Active transport requires metabolic energy
It occurs through special membrane proteins
It is a rapid process
Active transport is insensitive to inhibitors that react with protein carriers
